Editor: Set show_tagcloud to false for Pattern Categories.

Pattern Categories is a taxonomy used to categories the patterns in the site editor.
It is not meant to be shown in the frontend and show tag clouds.

Props wildworks, mukesh27.
Fixes #60119.

git-svn-id: https://develop.svn.wordpress.org/trunk@57331 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/taxonomy.php

@@ -241,6 +241,7 @@ function create_initial_taxonomies() {
 			'show_in_nav_menus'  => false,
 			'show_in_rest'       => true,
 			'show_admin_column'  => true,
+			'show_tagcloud'      => false,
 		)
 	);
 }