Delete system tests that duplicate JS tests

What does this MR do?

This deletes a bunch of system tests for the filtered search bar. The tests were basically duplicated for all the possible tokens, while the basic functionalities are already tested at the JS level.

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Merge request performance guidelines
• Style 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 #28852 (closed).