Moves `Block` to `frame_system` instead of `construct_runtime` and removes `Header` and `BlockNumber` (#7431)

* Companion for substrate

* Minor update

* Formatting

* Fixes for cumulus

* Fixes tests in polkadot-runtime-parachains

* Minor update

* Removes unused import

* Fixes tests in polkadot-runtime-common

* Minor fix

* Update roadmap/implementers-guide/src/runtime/configuration.md

Co-authored-by: ordian <[email protected]>

* ".git/.scripts/commands/fmt/fmt.sh"

* update lockfile for {"substrate"}

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