Media: Add `object-fit` to the allowed list of CSS properties.

This resolves a bug in Featured Image blocks where `object-fit` was being removed during the `render_callback`.

Props raduiason, pbiron, kebbet, SergeyBiryukov, bernhard-reiter, ironprogrammer, xknown, audrasjb, ckanderson22, ivanjeronimo, seriouslysenpai, davidbaumwald.
Merges [54675] to the 6.0 branch.
Fixes #56855.


Built from https://develop.svn.wordpress.org/branches/6.0@54763


git-svn-id: http://core.svn.wordpress.org/branches/6.0@54315 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/kses.php

@@ -2371,6 +2371,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'direction',
 			'float',
 			'list-style-type',
+			'object-fit',
 			'object-position',
 			'overflow',
 			'vertical-align',

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0.4-alpha-54628';
+$wp_version = '6.0.4-alpha-54763';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.