Don't show tooltips on Open and Closed boards

What does this MR do?

Fixes #63890 (closed)

The tooltips on the Open and Closed boards are, respectively, Open and Closed. This redundancy is redundant, so the tooltips were removed from the titles of those boards.

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