Revert "Check wp_installing first to prevent side effect"

This reverts commit d74109e.

Author: oakesjosh

src/Schema/Builder.php

@@ -263,7 +263,7 @@ public function register_custom_tables_names() {
 	 * @return array<mixed> A list of each creation or update result.
 	 */
 	public function up( $force = false ) {
-		if ( wp_installing() || ! is_blog_installed() ) {
+		if ( ! is_blog_installed() || wp_installing() ) {
 			return [];
 		}