[GSS](7.0.z) HHH-4959 HHH-11377: Concurrent HQL parsing blocks on ReflectHelper.classForName()

For HQL-heavy applications, concurrency is lost as ReflectHelper.classForName() runs forName()/loadClass() for tokens (many of which are not classes). As loadClass() is synchronized, it blocks while it generates stacktraces for its exceptions impacting performance when performing HQL.