Quanrantine failing test `nuget_repository_spec.rb`

What does this MR do?

Putting nuget_repository_spec.rb under quarantine since it has been failing consistently in caranary #321425 (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