Experimental portable lockdirs #30048

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Job	Run time
Coq 8.16.1	7m 7s
Build microbenchmarks	2m 35s
Create local opam switch (macos-latest, 5)	7m 51s
Create local opam switch (macos-latest, 4.14)	6m 5s
Build (macos-latest, 5.1.x)	14m 20s
Create local opam switch (ubuntu-latest, 5)	5m 3s
Build (ubuntu-latest, 5.1.x)	8m 8s
Documentation	3m 23s
Format	1m 3s
Build (ocaml-variants.5.4.0+trunk, ubuntu-latest, true)	1m 20s
Create local opam switch (ubuntu-latest, 4.14)	5m 41s
Build (4.14.x, ubuntu-latest, true)	1m 19s
Build monorepo benchmark docker image	4m 15s
Build (4.14.x, macos-latest, true)	2m 19s
Nix (macos-latest)	2m 23s
Build (5.1.x, macos-13, true)	3m 39s
Wasm_of_ocaml	9m 58s
Nix (ubuntu-latest)	52s
Build (ocaml-base-compiler.4.14.2,system-msvc, windows-latest)	7m 44s
Build (ocaml-base-compiler.5.1.1,system-mingw, windows-latest)	8m 5s
Build (4.08.x, ubuntu-latest, true)	1m 23s
	1h 44m 33s

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