Tests: Remove the formatting group from wp_is_numeric_array() tests.

Similar to `wp_array_slice_assoc()` or other array-related functions, this appears to be a general-purpose function unrelated to the Formatting component.

Add missing `public` visibility keyword.

Follow-up to [52037].

See #53971.
Built from https://develop.svn.wordpress.org/trunk@52048


git-svn-id: http://core.svn.wordpress.org/trunk@51640 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52047';
+$wp_version = '5.9-alpha-52048';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.