Asynchronous digests part #2 #38076

Job	Run time
Bootstrap (ubuntu-latest)	4m 37s
Documentation	56s
Nix Tests (ubuntu-latest)	8m 28s
Nix Build 4.08 (ubuntu-latest)	1m 23s
Format	1m 28s
Test that the utop dev tool can be built and run	9m 0s
Cygwin Build	3m 14s
Build with OxCaml (ubuntu-latest)	26m 21s
Nix Build (ubuntu-latest)	1m 13s
Nix Build (macos-latest)	2m 16s
Building Dune with OxCaml	32m 11s
Build microbenchmarks	2m 2s
Rocq 9.1	2m 40s
Rocq 9.1 (native)	2m 11s
Wasm_of_ocaml	2m 16s
Create local opam switch (macos-latest, 5)	10m 6s
Create local opam switch (ubuntu-latest, 5)	6m 7s
Build	0s
	1h 56m 29s

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