Merge branch '516285-add-indexed-at-debounce' into 'master'

Zoekt: Add indexed_at debounce

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/180573



Merged-by: John Mason <9717668-johnmason@users.noreply.gitlab.com>
Approved-by: John Mason <9717668-johnmason@users.noreply.gitlab.com>
Reviewed-by: Dmitry Gruzd <dgruzd@gitlab.com>
Co-authored-by: Dmitry Gruzd <dgruzd@gitlab.com>