feat: add `RevisionVec` to store USK subkeys #1651

Job	Run time
cargo-lint / cargo-doc / doc	34s
cargo-lint / cargo-dry-publish / publish	27s
cargo-lint / cargo-semver / Check semver	44s
cargo-lint / cargo-nursery-base / cargo-audit / Audit	6m 38s
cargo-lint / cargo-nursery-base / cargo-udeps / Check udeps	55s
cargo-lint / cargo-nursery-base / cargo-lint / lint	1m 50s
cleanup	0s
cargo-publish	0s
	11m 8s

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