style: add back phpstan ignores

Author: innocenzi

src/Tempest/Framework/Testing/Http/TestResponseHelper.php

@@ -529,7 +529,7 @@ public function assertHasNoJsonValidationErrors(): self
      */
     public function dd(): void
     {
-        dd($this->response);
+        dd($this->response); // @phpstan-ignore disallowed.function
     }
 
     private function assertHasContainer(): void

tests/Integration/Http/HttpExceptionHandlerTest.php

@@ -58,7 +58,7 @@ public function __construct(FrameworkKernel $kernel)
 
                 public static function boot(string $root, array $discoveryLocations = [], ?Container $container = null): self
                 {
-                    return Kernel::boot($root, $discoveryLocations, $container);
+                    return Kernel::boot($root, $discoveryLocations, $container); // @phpstan-ignore-line
                 }
 
                 public function shutdown(int|string $status = ''): never

tests/Integration/Mapper/Fixtures/SerializableObject.php

@@ -8,6 +8,7 @@ final class SerializableObject implements Serializable
 {
     /*
      * @mago-expect lint:return-type
+     * @phpstan-ignore return.unusedType
      */
     public function serialize()
     {