Group Level Wiki: BE WikiPage::Meta support

Problem to solve

WikiPage::Meta and WikiPage::Slug only supports projects.

Note: This issue is a child of the Group Level Wiki Implementation Epic &2214 (closed)

Proposal

Add a second table to track group wikis.

Tentative MR Breakdown

1. Add migration to add group_wiki_page_metas and group_wiki_page_slugs tables
2. Extract and share common logic between WikiPage::Meta and GroupWikiPage::Meta

Permissions and Security

Documentation (remove if not applicable)

This issue does not require the creation of documentation.

Testing

Testing Approach

• Analyze the existing project wiki specific tests. Is it covered at the appropriate level?
• Adapt existing tests for project wikis to group wikis.

Success Criteria

• Service classes for group wikis are working and tested.

Links / references