Build with OCaml 5.3 #12103

Job	Run time
build_js	2m 36s
build_opam (4.14.x)	7m 53s
build_details	2s
build_opam (5.3.x)	9m 33s
tree_sitter_parse	47s
lezer_parse	49s
build_no_depopts	6m 44s
build_posix (debian_trixie, amd64)	16m 48s
build_win32 (x64)	10m 27s
build_posix (debian_trixie, arm64)	14m 20s
run_tests (@citest)	14m 12s
build_posix (debian_bookworm, amd64)	15m 25s
run_tests (@doctest)	9m 0s
build_posix (debian_bookworm, arm64)	12m 53s
update_doc	10m 55s
run_tests (@mediatest)	12m 58s
build_posix (ubuntu_oracular, amd64)	15m 14s
build_posix (ubuntu_oracular, arm64)	12m 15s
build_posix (ubuntu_noble, amd64)	16m 12s
build_posix (ubuntu_noble, arm64)	12m 39s
build_posix (alpine, amd64)	11m 22s
build_posix (alpine, arm64)	9m 12s
fetch_s3_artifacts	21s
build_docker_minimal (amd64)	1m 26s
build_docker (amd64)	1m 26s
build_docker_minimal (arm64)	2m 21s
build_docker (arm64)	1m 58s
build_docker_alpine (amd64)	46s
build_docker_alpine (arm64)	1m 8s
build_docker_alpine_minimal (amd64)	57s
update_release	0s
build_docker_alpine_minimal (arm64)	11s
build_docker_release	0s
build_docker_release-minimal	0s
	3h 52m 50s

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