Merge branch 'determine-sharding-key-feature-category-importers' into 'master'

Add sharding keys for importers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143309



Merged-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Approved-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Approved-by: George Koltsov <gkoltsov@gitlab.com>
Co-authored-by: Tiger <twatson@gitlab.com>