Fix group level autocomplete sources for work items / issues
Autocomplete sources was not working for group level issues/work items
URLs like https://gitlab.com/groups/gitlab-org/plan-stage/-/autocomplete_sources/members?type=WorkItem&type_id=91 would return a 500 error
Autocomplete sources still point to a project-like route to fetch data for the autocomplete dialogs.
Current/404: https://gitlab.com/gitlab-org/plan-stage/-/autocomplete_sources/members?type=WorkItem&type_id=91
Desired/Exists: https://gitlab.com/groups/gitlab-org/plan-stage/-/autocomplete_sources/members?type=WorkItem&type_id=91
Edited by Mario Celi