Updates coder/customers#365
This PR updates our migration framework to run all migrations in a single transaction. This is the same behavior we had in v1 and ensures that failed migrations don't bring the whole deployment down. If a migration fails now, it will automatically be rolled back to the previous version, allowing the deployment to continue functioning.
* feat: implement deprecated flag for templates to prevent new workspaces
* Add deprecated filter to template fetching
* Add deprecated to template table
* Add deprecated notice to template page
* Add ui to deprecate a template