Add codeOwnerReviewRequired GraphQL field to EE

What does this MR do and why?

#362706 (closed) -> #372362 (closed)

We expose protected_branch.code_owner_review_required through the GraphQL API. The CODEOWNER review required feature is EE only.

This change adds codeOwnerReviewRequired attribute in GraphQL to the CE GraphQL Type class via an EE extension module.

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