Merge branch '417757-board-autocomplete-queries' into 'master'

Use new query for issue board users autocomplete

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129570



Merged-by: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Approved-by: Briley Sandlin <bsandlin@gitlab.com>
Approved-by: Samantha Ming <sming@gitlab.com>
Approved-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Approved-by: Siddharth Dungarwal <sdungarwal@gitlab.com>
Co-authored-by: Heinrich Lee Yu <heinrich@gitlab.com>