Boards - Prevent page reload on create/update board

• Dynamically update the page when creating or updating a board
• Use VueX state as single source of truth for board data
• Remove boardId from injected props to make it dynamic

Before	After
Board_10___Boards___Gitlab_Org___GitLab	Dynamic_create_and_update_board

To test locally

These steps should be tested for a project issue board, a group issue board and an epic board.

1. Load a board
2. In the top left dropdown, select Create new board
3. Expand scope and add some options
4. Save
5. Ensure the filter bar gets updated with the filters selected when creating the board
6. In the top right corner, click Edit board
7. Change some values in scope and save
8. Ensure the filter bar is updated

Related to #355130 (closed)