Merge branch 'determine-desired-sharding-key-feature-category-service_desk' into 'master'

Add desired sharding keys for service_desk

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/148041



Merged-by: Andy Schoenen <asoiron@gitlab.com>
Approved-by: Marc Saleiko <msaleiko@gitlab.com>
Approved-by: Andy Schoenen <asoiron@gitlab.com>
Co-authored-by: Manoj M J <mmj@gitlab.com>