Merge branch '515808-timeout-exceptions-in-zoekt-planningservice-during-rollout' into 'master'

Add project_namespace_ids in zoekt_indices metadata

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/179558



Merged-by: Dmitry Gruzd <dgruzd@gitlab.com>
Approved-by: Dmitry Gruzd <dgruzd@gitlab.com>
Co-authored-by: rkumar555 <rkumar@gitlab.com>