`use_block_editor_for_post()` and `use_block_editor_for_post_type()` determine if the block editor should be loaded. `get_block_categories()` and `get_block_editor_server_block_settings()` provide data be included while the block editor is loading. Props pento. Merges [43762] to trunk. See #45110. git-svn-id: https://develop.svn.wordpress.org/trunk@44122 602fd350-edb4-49c9-b593-d223f7449a82