Editor: Update packages for 6.6.2 RC1.

Updates the versions from the [WordPress/gutenberg@a74a70e released packages] for the following bugfixes:

- [WordPress/gutenberg#63980 Global Styles: Fix block custom CSS pseudo element selectors]
- [WordPress/gutenberg#64463 Featured Image Block: Reduce CSS specificity]
- [WordPress/gutenberg#64076 Fix bumped specificity for layout styles in non-iframed editor]
- [WordPress/gutenberg#64379 Don't allow duplicating template parts in non-block-based themes]
- [WordPress/gutenberg#64250 Data Views: Don't render action modal when there are no eligible items]
- [WordPress/gutenberg#63724 Fix canvas issues by removing VisualEditor’s height]
- [WordPress/gutenberg#64992 Post Editor: fix click space after post content to append]
- [WordPress/gutenberg#63939 Post Editor: Prevent popover from being hidden by metabox]
- [WordPress/gutenberg#64639 Post editor: apply space below content using a pseudo-element instead of padding-bottom]
- [WordPress/gutenberg#64015 Avoid errors for post types without a 'menu_icon']
- [WordPress/gutenberg#64458 Update postcss-prefixwrap dependency to 1.51.0 to fix prefixing in :where selectors]

Reviewed by jorbin, hellofromTonya.
Merges [58988] to the 6.6 branch.

Props vcanales.
Fixes #61982.
See #61704, #61769, #61829.


git-svn-id: https://develop.svn.wordpress.org/branches/6.6@58989 602fd350-edb4-49c9-b593-d223f7449a82