Fix elections-phragmen and proxy issue (#7040)

* Fix elections-phragmen and proxy issue

* remove TODO

* Update bond to be per-vote

* Update frame/elections-phragmen/src/lib.rs

* Fix benchmakrs

* Fix weight as well.

* Add license

* Make weight interpreted wasm! 🤦🏻

‍♂️

* Remove a bunch of TODOs

* Add migration

* Better storage version.

* Functionify.

* Fix deposit scheme.

* remove legacy bond.

* Master.into()

* better logging.

* Fix benchmarking test

* Fix confused deposit collection.

* Add fine

* Better name for storage item

* Fix name again.

* remove unused

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Guillaume Thiolliere <[email protected]>

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Guillaume Thiolliere <[email protected]>

* cargo run --release --features runtime-benchmarks --manifest-path bin/node/cli/Cargo.toml -- benchmark --chain dev --steps 50 --repeat 20 --extrinsic * --execution=wasm --wasm-execution=compiled --output ./bin/node/runtime/src/weights --header ./HEADER --pallet pallet_elections_phragmen

* new weight fns

* Fix build

* Fix line width

* fix benchmakrs

* fix warning

* cargo run --release --features runtime-benchmarks --manifest-path bin/node/cli/Cargo.toml -- benchmark --chain dev --steps 50 --repeat 20 --extrinsic * --execution=wasm --wasm-execution=compiled --output ./bin/node/runtime/src/weights --header ./HEADER --pallet pallet_elections_phragmen

* Tune the stake again

* cargo run --release --features runtime-benchmarks --manifest-path bin/node/cli/Cargo.toml -- benchmark --chain dev --steps 50 --repeat 20 --extrinsic * --execution=wasm --wasm-execution=compiled --output ./bin/node/runtime/src/weights --header ./HEADER --pallet pallet_elections_phragmen

* All tests work again.

* A large number of fixes.

* more fixes.

* Fix node build

* Some fixes to benchmarks

* Fix some warnings.

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_elections_phragmen --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/elections-phragmen/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_elections_phragmen --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/elections-phragmen/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Guillaume Thiolliere <[email protected]>

* a batch of review comments.

* Fix a test.

* Fix some more tests.

* do migration with pallet version???

* Final touches.

* Remove unused storage.

* another rounds of changes and fixes.

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Shawn Tabrizi <[email protected]>

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Shawn Tabrizi <[email protected]>

* Review grumbles.

* Fix a bit more.

* Fix build

* Experimental: independent migration.

* WIP: isolated migration logics

* clean up.

* make migration struct private and move migration to own file

* add doc

* fix StorageInstance new syntax

* Update frame/elections-phragmen/src/migrations_3_0_0.rs

Co-authored-by: Shawn Tabrizi <[email protected]>

* another round of self-review.

* bit better formatting

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_elections_phragmen --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/elections-phragmen/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Fix tests.

* Round of self-review

* Clean migrations

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_elections_phragmen --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/elections-phragmen/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Revert unwanted change to construct-runtime

Co-authored-by: Gavin Wood <[email protected]>
Co-authored-by: Guillaume Thiolliere <[email protected]>
Co-authored-by: Shawn Tabrizi <[email protected]>
Co-authored-by: Parity Benchmarking Bot <[email protected]>