Block Hooks: Fix context in update_ignored_hooked_blocks_postmeta.

Ensure that the `$context` arg passed from `update_ignored_hooked_blocks_postmeta` to `apply_block_hooks_to_content` (and from there, to filters such as `hooked_block_types` and `hooked_block`) has the correct type (`WP_Post`).

Filters hooked to `hooked_block_types` etc can typically include checks that conditionally insert a hooked block depending on `$context`. Prior to this changeset, a check like `if ( $context instanceof WP_Post )` would incorrectly fail, as `$context` would be a `stdClass` instance rather than a `WP_Post`. As a consequence, a hooked block inside of a Navigation post object that was modified by the user would not be marked as ignored by `update_ignored_hooked_blocks_postmeta`, and thus be erroneosly re-inserted by the Block Hooks algorithm.

Props bernhard-reiter.
Fixes #62639.
Built from https://develop.svn.wordpress.org/trunk@59482


git-svn-id: http://core.svn.wordpress.org/trunk@58868 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/blocks.php

@@ -1217,6 +1217,7 @@ function update_ignored_hooked_blocks_postmeta( $post ) {
 	$existing_post = get_post( $post->ID );
 	// Merge the existing post object with the updated post object to pass to the block hooks algorithm for context.
 	$context          = (object) array_merge( (array) $existing_post, (array) $post );
+	$context          = new WP_Post( $context ); // Convert to WP_Post object.
 	$serialized_block = apply_block_hooks_to_content( $markup, $context, 'set_ignored_hooked_blocks_metadata' );
 	$root_block       = parse_blocks( $serialized_block )[0];
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.8-alpha-59481';
+$wp_version = '6.8-alpha-59482';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.