Themes: Fix core block style paths on Windows.

This is a follow-up to [56528], which normalizes the `BLOCKS_PATH` for Windows prior to making paths relative for caches during the registration process. Prior to 
this change, incorrect file paths would lead to broken styles for core blocks on Windows.

Props wildworks, pbiron, flixos90, joemcgill.
Merges [56785] to the 6.3 branch.
Fixes #59489. See #59111.




Built from https://develop.svn.wordpress.org/branches/6.3@56789


git-svn-id: http://core.svn.wordpress.org/branches/6.3@56301 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/blocks/index.php

@@ -68,9 +68,13 @@ function register_core_block_style_handles() {
 
 	if ( ! $files ) {
 		$files = glob( wp_normalize_path( BLOCKS_PATH . '**/**.css' ) );
+
+		// Normalize BLOCKS_PATH prior to substitution for Windows environments.
+		$normalized_blocks_path = wp_normalize_path( BLOCKS_PATH );
+
 		$files = array_map(
-			static function ( $file ) {
-				return str_replace( BLOCKS_PATH, '', $file );
+			static function ( $file ) use ( $normalized_blocks_path ) {
+				return str_replace( $normalized_blocks_path, '', $file );
 			},
 			$files
 		);

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3.2-alpha-56787';
+$wp_version = '6.3.2-alpha-56789';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.