Tests: Replace `assertEquals()` with `assertSame()` in block template tests.

This ensures that not only the return values match the expected results, but also that their type is the same.

Going forward, stricter type checking by using `assertSame()`, `assertSameSets()`, or `assertSameSetsWithIndex()` should generally be preferred, to make the tests more reliable.

Follow-up to [51003], [51079], [52062], [52265].

See #53364, #53363, #54335.
Built from https://develop.svn.wordpress.org/trunk@52266


git-svn-id: http://core.svn.wordpress.org/trunk@51858 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52265';
+$wp_version = '5.9-alpha-52266';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.