Backport "check_project_feature_available!" from EE and use it for CE controllers

What does this MR do?

Introduces a new helper method for checking available project features, modelled on authorize_:symbol!, which uses method_missing.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Backport from EE: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2164/diffs#note_32996176

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Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

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