cc https://github.com/paritytech/ci_cd/issues/1035

cc https://github.com/paritytech/ci_cd/issues/1023

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: command-bot <>
Co-authored-by: Maksym H <1177472+mordamax@users.noreply.github.com>
Co-authored-by: gui <gui.thiolliere@gmail.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: ggwpez <ggwpez@users.noreply.github.com>

- restore update-ui.sh (accidentally removed with bunch of bash 
- fix empty context and pushing to dev branch (supporting forks)
tested fork here: https://github.com/paritytech-stg/polkadot-sdk/pull/45

Closes https://github.com/paritytech/product-engineering/issues/93

- Deprecates old command bot bash scripts. New cmd implementation is
re-written on Python
- Deprecates `sync` command, which was never used
- Benchmarks:
- Uses new
[frame-omni-bencher](https://crates.io/crates/frame-omni-bencher)
- Simplifies usage to only providing a runtime and/or pallet name (even
multiple runtimes or pallets)
- Supports sub-modules (like `/cmd bench --runtime dev --pallet
pallet_asset_conversion_ops`)
- Can regenerate all weights with one command (substrate, polkadot,
cumulus) for provided pallet(s) name
- Adds [subweight](https://crates.io/crates/subweight-core) diff as a
result of bench command

The test name is `test-frame-ui` I don't know if I can also change it to
`test-ui` without breaking other stuff. So I kept the name unchanged.

---------

Co-authored-by: Bastian Köcher <git@kchr.de>

Related https://github.com/paritytech/polkadot-sdk/issues/2013

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

- Updated ./docs/CONTRIBUTION.md to clarify how to use command bot and
update ui-tests locally or in PR
- Moved update-ui-tests.sh to a root of project to run them along for
substrate and polkadot together

---------

Co-authored-by: Mira Ressel <mira@parity.io>