[FRAME Core] remove unnecessary overrides while using derive_impl for frame_system (#3317)

# Description

This PR removes redundant type definition from test definition config
implementations like
```
#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
impl frame_system::Config for Test {
    type A = A;
    ...
}
```

This changes avoid redundancies in the code as the macro `derive_impl`
defines the relevant types. To implement the changes, it was a simple
fact of running tests and making sure that the tests would still run
while the definition would be removed.

Closes #3237

As a note, here is a brief account of things done from the Issue's
description statement
```
alliance migrate alliance, fast-unstake and bags list to use derive-impl #1636
asset-conversion                                                                                            DONE
asset-rate                                                                                                  DONE
assets                                                                                                      DONE
atomic-swap                                                                                                 DONE
aura                                                                                                        DONE
authority-discovery                                                                                         DONE                                                                     
authorship  migrate babe and authorship to use derive-impl #1790
babe  migrate babe and authorship to use derive-impl #1790
bags-list migrate alliance, fast-unstake and bags list to use derive-impl #1636
balances                                                                                                    DONE
beefy                                                                                                       NOTHING TO DO --- also noted this error without failing tests Feb 13 13:49:08.941 ERROR runtime::timestamp: `pallet_timestamp::UnixTime::now` is called at genesis, invalid value returned: 0
beefy-mmr                                                                                                   NOTHING TO DO
bounties                                                                                                    DONE
child-bounties                                                                                              DONE
collective                                                                                                  DONE
contracts                                                                                                   DONE
conviction-voting                                                                                           DONE
core-fellowship                                                                                             NOTHING TO DO
democracy                                                                                                   DONE
election-provider-multi-phase                                                                               NOTHING TO DO
elections-phragmen                                                                                          DONE
executive                                                                                                   NOTHING TO DO
fast-unstake migrate alliance, fast-unstake and bags list to use derive-impl #1636
glutton                                                                                                     DONE
grandpa                                                                                                     DONE
identity                                                                                                    DONE
im-online                                                                                                   NOTHING TO DO
indices Refactor indices pallet #1789
insecure-randomness-collective-flip                                                                         DONE
lottery                                                                                                     DONE
membership                                                                                                  DONE
merkle-mountain-range                                                                                       NOTHING TO DO
message-queue                                                                                               DONE
multisig add frame_system::DefaultConfig to individual pallet DefaultConfigs substrate#14453
nft-fractionalization                                                                                       DONE
nfts                                                                                                        DONE
nicks Refactor pallet-state-trie-migration to fungible::* traits #1801                                      NOT IN REPO
nis                                                                                                         DONE
node-authorization                                                                                          DONE
nomination-pools                                                                                            NOTHING TO DO -- ONLY impl for Runtime
offences                                                                                                    DELETED EVERYTHING -- IS THAT CORRECT??
preimage                                                                                                    DONE
proxy add frame_system::DefaultConfig to individual pallet DefaultConfigs substrate#14453
ranked-collective                                                                                           NOTHING TO DO
recovery                                                                                                    DONE
referenda                                                                                                   DONE
remark                                                                                                      DONE
root-offences                                                                                               DONE
root-testing                                                                                                NOTHING TO DO
salary                                                                                                      NOTHING TO DO
scheduler                                                                                                   DONE
scored-pool                                                                                                 DONE
session                                                                                                     DONE -- substrate/frame/session/benchmarking/src/mock.rs untouched
society                                                                                                     NOTHING TO DO
staking                                                                                                     DONE
staking-bags-benchmarks                                                                                     NOT IN REPO
state-trie-migration                                                                                        NOTHING TO DO
statement                                                                                                   DONE
sudo                                                                                                        DONE
system                                                                                                      DONE
timestamp                                                                                                   DONE
tips                                                                                                        DONE
transaction-payment                                                                                         NOTHING TO DO
transaction-storage                                                                                         NOTHING TO DO
treasury                                                                                                    DONE
try-runtime                                                                                                 NOTHING TO DO -- no specific mention of 'for Test'
uniques                                                                                                     DONE
utility                                                                                                     DONE
vesting                                                                                                     DONE
whitelist                                                                                                   DONE
```

---------

Co-authored-by: command-bot <>
Co-authored-by: gupnik <[email protected]>