This PR fixes the following issues:

• Removes the reliance on a resolved dashboardState object for rendering bookmarks and instead processes the saved bookmark URL directly in the dialog component
• Because of the above, this PR fixes an issue where the bookmark properties would be overwritten with the current dashboard state when editing
• On Canvas, the grain parameter is not supported: this PR removes instances where it was being set and makes it a little more explicit
• Prevents the CanvasBookmarks from initializing a canvas store before the dashboard is loaded by removing the need to call getCanvasStore

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!