Feat: on-disk RevIndex based on RocksDB #3787

Job	Run time
Check	35s
coverage	14m 14s
test_all_features	17m 59s
test (beta)	2m 17s
test (stable)	2m 22s
test (windows)	6m 30s
test (macos)	3m 29s
Check if cbindgen runs cleanly for generating the C headers	11m 55s
Lints (beta)	59s
Lints (stable)	42s
minimum_rust_version	13m 32s
Publish (dry-run)	9m 58s
Run tests under wasm32-wasi	2m 32s
Check if wasm-pack builds a valid package for the sourmash crate	2m 19s
	1h 29m 23s

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