PLANET-7345: Disable Posts List Query Loop WP variation (#2182)

Ref: https://jira.greenpeace.org/browse/PLANET-7345

- Avoid naming confusions to editors since we have already
- A Posts List P4 variation with the same name

Co-authored-by: Dan Tovbein <dtovbein@gmail.com>

assets/src/blocks/editorIndex.js

@@ -1,6 +1,11 @@
 import {registerPostsListBlock} from './PostsList';
 import {registerActionsList} from './ActionsList';
 
-// Beta blocks
-registerActionsList();
-registerPostsListBlock();
+wp.domReady(() => {
+  // Make sure to unregister the posts-list native variation before registering planet4-blocks/posts-list-block
+  wp.blocks.unregisterBlockVariation('core/query', 'posts-list');
+
+  // Beta blocks
+  registerActionsList();
+  registerPostsListBlock();
+});