Merge branch 'id-model-metadata-for-completions' into 'master'

Send model metadata for completion features

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184160



Merged-by: Eduardo Bonet <ebonet@gitlab.com>
Approved-by: Eduardo Bonet <ebonet@gitlab.com>
Reviewed-by: Igor Drozdov <idrozdov@gitlab.com>
Reviewed-by: Eduardo Bonet <ebonet@gitlab.com>
Co-authored-by: Igor Drozdov <idrozdov@gitlab.com>