test: refactor: fix test method names

Author: kenjis

tests/system/HTTP/IncomingRequestTest.php

@@ -110,7 +110,7 @@ public function testMissingOldInput()
     /**
      * @see https://github.com/codeigniter4/CodeIgniter4/issues/1492
      */
-    public function testCanGetOldInputArray()
+    public function testCanGetOldInputArrayWithSESSION()
     {
         $_SESSION['_ci_old_input'] = [
             'get'  => ['apple' => ['name' => 'two']],
@@ -127,7 +127,7 @@ public function testCanGetOldInputArray()
      * @runInSeparateProcess
      * @preserveGlobalState  disabled
      */
-    public function testCanSerializeOldArray()
+    public function testCanGetOldInputArrayWithSessionService()
     {
         $locations = [
             'AB' => 'Alberta',