Split fuzz runners by hash mode #22927

Job	Run time
ext-test	8m 36s
linting	2m 33s
tor-connect	5m 57s
check_release	2m 51s
check_docs	6m 37s
rustfmt	13s
fuzz_sanity	12m 18s
build-features / build (self-hosted, 1.75.0)	18m 9s
benchmark	17m 14s
build-nostd / build (self-hosted, 1.75.0)	17m 54s
build-workspace / build (self-hosted, 1.75.0)	15m 9s
build-bindings / build (self-hosted, 1.75.0)	13m 59s
build-cfg-flags / build (self-hosted, 1.75.0)	12m 15s
fuzz	15m 20s
build-sync / build (self-hosted, 1.75.0)	8m 35s
coverage	1s
notify-failure	1s
	2h 37m 42s

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