Backport from polkadot staging: more commits (#2698)

* Adjusted constant because for measuring we used mistakenly rococo constants (#2664)

* Adjusted constant because for measuring we used mistakenly rococo constants

* typo

* Nit from `polkadot-sdk` (#2665)

* BHR/BHWE spec_version according to the `polkadot-sdk` (#2668)

* typo (#2690)

* removed unused PARACHAINS_FINALITY_PALLET_NAME constant (#2670)

* backport https://github.com/paritytech/polkadot-sdk/pull/2139 (#2673)

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Co-authored-by: Branislav Kontur <[email protected]>