BucketList cache #6403

Job	Run time
fmt	16s
build (gcc, current)	1h 4m 35s
rust-check-git-rev-deps	40s
cargo-deny (advisories)	1m 19s
build (gcc, current, --check-test-tx-meta)	52m 44s
cargo-deny (bans licenses sources)	45s
build (gcc, next)	1h 5m 57s
build (gcc, next, --check-test-tx-meta)	56m 49s
build (clang, current)	41m 3s
build (clang, current, --check-test-tx-meta)	44m 57s
build (clang, next)	41m 34s
build (clang, next, --check-test-tx-meta)	46m 56s
complete	1s
	6h 57m 36s

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