Fix missing 'Pipeline schedules' link

What does this MR do?

Fix missing 'Pipeline schedules' link.

Add test case for FOSS and EE project navbar structure.

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

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

Closes #199088 (closed)