Add runtime deprecations for class aliases

We added many class rename deprecations during 4.x but didn't include
runtime deprecations for them. Adding runtime deprecations in 4.5 will
encourage developers to update their code before the breaking change in
5.0

Refs cakephp/docs#7561

ControllerFactory.php

@@ -1,10 +1,8 @@
 <?php
 declare(strict_types=1);
 
-class_alias(
-    'Cake\Controller\ControllerFactory',
-    'Cake\Http\ControllerFactory'
-);
 deprecationWarning(
-    'Use Cake\Controller\ControllerFactory instead of Cake\Http\ControllerFactory.'
+    'Since 4.2.0: Cake\Http\ControllerFactory is deprecated. ' .
+    'Use Cake\Controller\ControllerFactory instead.'
 );
+class_exists('Cake\Controller\ControllerFactory');

TestSuite/HttpClientTrait.php

@@ -115,3 +115,10 @@ public function mockClientDelete(string $url, Response $response, array $options
         Client::addMockResponse('DELETE', $url, $response, $options);
     }
 }
+
+// phpcs:disable
+class_alias(
+    'Cake\Http\TestSuite\HttpClientTrait', 
+    'Cake\TestSuite\HttpClientTrait'
+);
+// phpcs:enable