Cleanup inotify watch when garbage collected. #11718

Job	Run time
build_js	1m 54s
build_opam (4.14.x)	8m 52s
build_details	5s
build_opam (5.2.x)	5m 3s
tree_sitter_parse	50s
build_no_depopts	6m 48s
build_win32 (x64)	17m 24s
build_posix (debian_trixie, amd64)	14m 33s
lezer_parse	50s
run_tests (@citest)	13m 50s
build_posix (debian_bookworm, amd64)	16m 9s
build_posix (ubuntu_oracular, amd64)	16m 22s
run_tests (@doctest)	8m 48s
update_doc	12m 36s
build_posix (ubuntu_noble, amd64)	16m 9s
run_tests (@mediatest)	13m 23s
build_posix (alpine, amd64)	13m 49s
fetch_s3_artifacts	20s
build_docker (amd64)	2m 22s
build_docker_alpine_minimal (amd64)	58s
build_docker_minimal (amd64)	2m 34s
build_docker_alpine (amd64)	49s
update_release	0s
build_docker_release	0s
build_docker_release-minimal	0s
	2h 54m 28s

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