Advanced search: Remove prefixed asterisk for path filters

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/113949



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Ravi Kumar <rkumar@gitlab.com>
Approved-by: Ashraf Khamis <akhamis@gitlab.com>
Approved-by: Terri Chu <tchu@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Co-authored-by: Ashraf Khamis <akhamis@gitlab.com>
Co-authored-by: maddievn <mvanniekerk@gitlab.com>