Make swimlanes choice persisting after board has been edited [RUN AS-IF-FOSS]

What does this MR do?

Currently, when the user applies swimlanes, then edits a board and saves the changes, they are redirected back to a board without swimlanes applied. The choice user has made about swimlanes should persist regardless of if I edit the board.

This MR fixes the wrong behavior with keeping the group_by query parameter in the redirect URL. Also, this MR takes a URL to redirect from the GraphQL updateBoard mutation response as a webPath instead of calculating it on the frontend side.

For the sake of consistency, a similar change for redirection URL was made for createBoard mutation. However, we don't keep grouping query parameter in this case, and always show a new board non-grouped.

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
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Related to #282299 (closed)