frame-omni-bencher short checks (#5268)

- Part of https://github.com/paritytech/ci_cd/issues/1006
- Closes: https://github.com/paritytech/ci_cd/issues/1010
- Related: https://github.com/paritytech/polkadot-sdk/pull/4405

- Possibly affecting how frame-omni-bencher works on different runtimes:
https://github.com/paritytech/polkadot-sdk/pull/5083

Currently works in parallel with gitlab short benchmarks. 
Triggered only by adding `GHA-migration` label to assure smooth
transition (kind of feature-flag).
Later when tested on random PRs we'll remove the gitlab and turn on by
default these tests

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Co-authored-by: Oliver Tale-Yazdi <[email protected]>