Support LFS for group wikis
Release notes
Problem to solve
LFS is supported on project wikis, but not on group wikis.
Intended users
User experience goal
Proposal
Implement LFS support for group wikis.
This requires some changes to our LFS models, which are currently coupled to projects.
Further details
Permissions and Security
Documentation
Update https://docs.gitlab.com/ee/user/group/index.html#group-wikis-limitations
Availability & Testing
Our current LFS specs are mainly testing project code repositories, we should refactor these into shared examples so we can consistently test all supported repository types.