Multisite: Do not prime site meta caches unless necessary.

Props spacedmonkey.
Fixes #46357. See #46167.

Built from https://develop.svn.wordpress.org/trunk@44926


git-svn-id: http://core.svn.wordpress.org/trunk@44757 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/ms-load.php

@@ -235,7 +235,8 @@ function get_site_by_path( $domain, $path, $segments = null ) {
 	}
 
 	$args = array(
-		'number' => 1,
+		'number'                 => 1,
+		'update_site_meta_cache' => false,
 	);
 
 	if ( count( $domains ) > 1 ) {