Remove `top` value for Geo read-only banner container styles

What does this MR do?

Fixes Geo secondary read-only banner styling by removing top from container CSS when Performance Bar or Header is visible.

Screenshots

Before	After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance 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 #32043 (closed)