Build/Test Tools: Fix and standardise calls to the tearDown() method in the test suite.

The parent method should be called after any test-specific teardown.

See #52625


git-svn-id: https://develop.svn.wordpress.org/trunk@50450 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/dbdelta.php

@@ -93,6 +93,7 @@ class Tests_dbDelta extends WP_UnitTestCase {
 
 		parent::tearDown();
 
+		// This has to be called after the parent `tearDown()` method.
 		$wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}dbdelta_test" );
 	}