prevent failures around not existing TypeInfo classes

Having a getType() method on an extractor is not enough. Such a method may
exist to be forward-compatible with the TypeInfo component. We still must
not call it if the TypeInfo component is not installed to prevent running into
errors for not-defined classes when the TypeInfo component is not installed.

Author: xabbuh

Mapping/Loader/PropertyInfoLoader.php

@@ -175,7 +175,7 @@ public function loadClassMetadata(ClassMetadata $metadata): bool
      */
     private function getPropertyTypes(string $className, string $property): TypeInfoType|array|null
     {
-        if (method_exists($this->typeExtractor, 'getType')) {
+        if (class_exists(TypeInfoType::class) && method_exists($this->typeExtractor, 'getType')) {
             return $this->typeExtractor->getType($className, $property);
         }