Concurrent fiber solver #29714

Job	Run time
Format	1m 6s
Build (macos-latest, 5.1.x)	13m 35s
Build (ubuntu-latest, 5.1.x)	8m 23s
Coq 8.16.1	7m 9s
Documentation	53s
Nix (macos-latest)	2m 9s
Build (ocaml-variants.5.4.0+trunk, ubuntu-latest, true)	1m 30s
Nix (ubuntu-latest)	54s
Build (4.14.x, ubuntu-latest, true)	1m 25s
Wasm_of_ocaml	10m 9s
Build (4.14.x, macos-latest, true)	2m 12s
Build microbenchmarks	2m 25s
Build (5.1.x, macos-13, true)	3m 55s
Create local opam switch (macos-latest, 5)	5m 13s
Build (ocaml-base-compiler.4.14.2,system-msvc, windows-latest)	15m 27s
Create local opam switch (macos-latest, 4.14)	6m 5s
Build (ocaml-base-compiler.5.1.1,system-mingw, windows-latest)	8m 17s
Build monorepo benchmark docker image	3m 36s
Create local opam switch (ubuntu-latest, 5)	4m 59s
Build (4.08.x, ubuntu-latest, true)	1m 34s
Create local opam switch (ubuntu-latest, 4.14)	4m 52s
Build (4.04.x, ubuntu-latest, true, true)	4m 26s
Build (4.02.x, ubuntu-latest, true)	3m 54s
	1h 54m 8s

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