Quarantine failing push_rules_spec

What does this MR do?

Quarantines qa/specs/features/ee/browser_ui/3_create/repository/push_rules_spec.rb

Related issue: #34978 (closed)

Screenshots

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