Refactor `BlockBuilder::propose_with` (#14405)

* Add log target

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Factor out apply_inherents

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Factor out apply_extrinsics

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Factor out print_summary

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Pimp print_summary

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Cleanup

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Fixes

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Update client/basic-authorship/src/basic_authorship.rs

Co-authored-by: Bastian Köcher <[email protected]>

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Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>