Fix inotify GC cleanup removing the watch function #11979

Job	Run time
build_js	2m 37s
build_details	5s
build_opam (4.14.x)	4m 7s
build_opam (5.2.x)	4m 9s
build_win32 (x64)	3m 29s
build_no_depopts	3m 44s
lezer_parse	49s
build_posix (debian_trixie, amd64)	3m 44s
run_tests (@citest)	3m 43s
build_posix (debian_trixie, arm64)	3m 18s
tree_sitter_parse	47s
run_tests (@doctest)	3m 43s
build_posix (debian_bookworm, amd64)	3m 43s
update_doc	0s
build_posix (debian_bookworm, arm64)	3m 23s
run_tests (@mediatest)	3m 43s
build_posix (ubuntu_oracular, amd64)	3m 43s
build_posix (ubuntu_oracular, arm64)	3m 19s
build_posix (ubuntu_noble, amd64)	3m 44s
build_posix (ubuntu_noble, arm64)	3m 20s
build_posix (alpine, amd64)	3m 43s
build_posix (alpine, arm64)	3m 24s
fetch_s3_artifacts	1s
build_docker	1s
build_docker_alpine	1s
build_docker_minimal	1s
update_release	1s
build_docker_alpine_minimal	1s
build_docker_release	1s
build_docker_release-minimal	1s
	1h 6m 25s

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