Apply load improvements (#4539) #6420

Job	Run time
fmt	17s
rust-check-git-rev-deps	19s
build (gcc, current)	1h 16m 41s
build (gcc, current, --check-test-tx-meta)	57m 45s
cargo-deny (advisories)	42s
build (gcc, next)	1h 19m 40s
cargo-deny (bans licenses sources)	48s
build (gcc, next, --check-test-tx-meta)	1h 3m 24s
build (clang, current)	1h 2m 31s
build (clang, current, --check-test-tx-meta)	50m 54s
build (clang, next)	1h 6m 3s
build (clang, next, --check-test-tx-meta)	54m 11s
complete	1s
	8h 33m 16s

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