Editor: Use defer loading strategy for block view scripts.

Props westonruter, joemcgill.
Fixes #59115.

Built from https://develop.svn.wordpress.org/trunk@56398


git-svn-id: http://core.svn.wordpress.org/trunk@55910 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/blocks.php

@@ -170,7 +170,8 @@ function register_block_script_handle( $metadata, $field_name, $index = 0 ) {
 		$script_handle,
 		$script_uri,
 		$script_dependencies,
-		isset( $script_asset['version'] ) ? $script_asset['version'] : false
+		isset( $script_asset['version'] ) ? $script_asset['version'] : false,
+		array( 'strategy' => 'defer' )
 	);
 	if ( ! $result ) {
 		return false;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56397';
+$wp_version = '6.4-alpha-56398';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.