Resolve "FOSS broken `master` due to spec/requests/api/group_boards_spec.rb" [RUN AS-IF-FOSS]

What does this MR do?

This moves policies from EE to FOSS.

Code using these policies was already moved in !49815 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.

Related to #297406 (closed)