Don't retain passive clocks at top-level #11734

Job	Run time
build_details	2s
build_js	37s
build_opam (4.14.x)	37s
build_opam (5.2.x)	36s
lezer_parse	40s
build_no_depopts	28s
build_posix (debian_trixie, amd64)	27s
build_win32 (x64)	27s
build_posix (debian_bookworm, amd64)	27s
run_tests (@citest)	27s
tree_sitter_parse	40s
build_posix (ubuntu_oracular, amd64)	27s
run_tests (@doctest)	27s
run_tests (@mediatest)	26s
build_posix (ubuntu_noble, amd64)	22s
build_posix (alpine, amd64)	28s
update_doc	0s
fetch_s3_artifacts	1s
build_docker	1s
update_release	1s
build_docker_alpine	1s
build_docker_alpine_minimal	1s
build_docker_minimal	1s
build_docker_release	1s
build_docker_release-minimal	1s
	7m 46s

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