Migrate `pallet-authorship` to umbrella crate #17086

Job	Run time
preflight / preflight	1m 20s
preflight / ci-versions	56s
check-runtime-migration (westend)	2m 21s
check-runtime-migration (asset-hub-westend)	2m 15s
check-runtime-migration (bridge-hub-westend)	2m 10s
check-runtime-migration (collectives-westend)	2m 8s
check-runtime-migration (coretime-westend)	2m 7s
All runtime migrations passed	1s
	13m 18s

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