kern: fix missing scheduler updates in KLightLock/Exception, fix RequestScheduleOnInterrupt

libraries/libmesosphere/source/kern_k_thread.cpp

@@ -328,7 +328,7 @@ namespace ams::kern {
         if (this->parent != nullptr) {
             this->parent->ReleaseUserException(this);
             if (this->parent->GetPinnedThread(GetCurrentCoreId()) == this) {
-                KScheduler::UnpinCurrentThread(this->parent);
+                this->parent->UnpinCurrentThread();
             }
         }