Lock file maintenance (#40515)

* Lock file maintenance
* Address Phan issues due to php-stubs/wordpress-stubs upgrade
  * Some typecasts to account for better Core type delcarations.
  * Suppress `current_user_can_for_blog` → `current_user_can_for_site`
    until we drop 6.6 support.
* Hack around Core SimplePie renaming

  Core upgraded their copy-pasted SimplePie library, which included
  renaming all the classes. While they did provide back-compat aliases, we
  run into a few problems:
  
  * A method parameter type of `SimplePie_Item` won't accept
    `SimplePie\Item`, while `SimplePie\Item` won't work on WP 6.6.
  * It's really hard to make Phan happy for both the two runs (with 6.7
    stubs and with 6.6 stubs).
  
  The best I was able to come up with was this:
  * Turn on `enable_class_alias_support`.
  * Alias `Jetpack\SimplePie\<name>` to the appropriate classes, and use
    those aliases everywhere.
    * Have phan load only one of the two alias files, depending on which
  	run it's doing.
  * Merge all the test mocks into one file and load them from
    bootstrap.php.

---------

Co-authored-by: Renovate Bot <[email protected]>
Co-authored-by: Brad Jorsch <[email protected]>

projects/packages/image-cdn/changelog/renovate-lock-file-maintenance

@@ -0,0 +1,5 @@
+Significance: patch
+Type: fixed
+Comment: Add a cast to make Phan happy. Should be no change to functionality.
+
+

projects/packages/image-cdn/src/class-image-cdn.php

@@ -393,7 +393,7 @@ public static function filter_the_content( $content ) {
 			 * present all attributes as double-quoted attributes and include at
 			 * most one copy of each attribute, escaping all values appropriately.
 			 */
-			$tag_name = strtolower( $processor->get_tag() );
+			$tag_name = strtolower( (string) $processor->get_tag() );
 			$tag      = new \WP_HTML_Tag_Processor( "<{$tag_name}>" );
 			$tag->next_tag();
 			foreach ( $processor->get_attribute_names_with_prefix( '' ) ?? array() as $name ) {

projects/plugins/automattic-for-agencies-client/changelog/renovate-lock-file-maintenance

@@ -0,0 +1,4 @@
+Significance: patch
+Type: changed
+
+Updated package dependencies.

projects/plugins/backup/changelog/renovate-lock-file-maintenance

@@ -0,0 +1,4 @@
+Significance: patch
+Type: changed
+
+Updated package dependencies.