Allow selecting of multiple project, and multiple groups for templates
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=223776) </details> <!--IssueSummary end--> ### Problem to solve Both the [Custom instance-level project templates](https://docs.gitlab.com/ee/user/admin_area/custom_project_templates.html) and the [Instance template repository](https://docs.gitlab.com/ee/user/admin_area/settings/instance_template_repository.html) only allow the selecting of one option. This means it is only possible to have a single project and a single group for instance wide templates. ### Proposal Allow selection of multiple entries. Multiple groups/projects. This will allow many projects/groups to include many different project templates and file templates. Better organization/scope etc. ### Documentation https://docs.gitlab.com/ee/user/admin_area/settings/instance_template_repository.html https://docs.gitlab.com/ee/user/admin_area/custom_project_templates.html ### Links / references [Internal ZD](https://gitlab.zendesk.com/agent/tickets/160840)
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