Add global request timeout setting. #11721

Job	Run time
build_js	2m 37s
build_opam (4.14.x)	8m 55s
build_details	2s
build_opam (5.2.x)	5m 12s
lezer_parse	54s
tree_sitter_parse	47s
build_no_depopts	7m 8s
build_posix (debian_trixie, amd64)	15m 4s
build_posix (debian_bookworm, amd64)	15m 45s
build_win32 (x64)	18m 50s
run_tests (@citest)	14m 5s
build_posix (ubuntu_oracular, amd64)	17m 1s
run_tests (@doctest)	13m 49s
build_posix (ubuntu_noble, amd64)	16m 19s
update_doc	0s
run_tests (@mediatest)	13m 41s
build_posix (alpine, amd64)	14m 17s
fetch_s3_artifacts	20s
build_docker (amd64)	2m 18s
build_docker_alpine_minimal (amd64)	45s
build_docker_alpine (amd64)	54s
build_docker_minimal (amd64)	2m 31s
update_release	0s
build_docker_release	0s
build_docker_release-minimal	0s
	2h 51m 14s

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