Docker image cleanup #34

Job	Run time
cleanup (gcc)	6s
cleanup (debian-bullseye)	26s
cleanup (debian-bookworm)	1m 25s
cleanup (rhel-10)	13s
cleanup (tools-rippled-clang-format)	6s
cleanup (rhel-8)	14s
cleanup (rhel-9)	26s
cleanup (ubuntu-noble)	55s
cleanup (tools-rippled-documentation)	4s
cleanup (tools-rippled-prettier)	4s
cleanup (ubuntu-jammy)	12s
cleanup (tools-rippled-pre-commit)	7s
	4m 18s

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