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What does this MR do?

Does not count forks against the project limit quota for users.

Original MR: gitlab-foss!1283 (closed)

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

Test added; waiting on the CI report.

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