Add filtering of data to boards with param support

What does this MR do?

This MR adds the ability to filter epic boards and have the url update based on the filtered search

Filtered Search Support:

• Labels
• Author
• Search Query

Repro

• rails c
• Feature.enable(:epic_boards)
• Feature.enable(:boards_filtered_search)
• Go to Groups -> Epics -> Boards
• Filter by label and author and search to test

Resolves: #327554 (closed)

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

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• Documentation (if required)
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• Style guides
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• 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
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

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• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team