Merge branch 'marina.mosti-docs-cleanup-timeouts' into 'master'

Docs: testing cleanup timers listeners

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/172996



Merged-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Approved-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Co-authored-by: Marina Mosti <mmosti@gitlab.com>