Fix GC stress failure in LoaderAllocator::CompareExchangeValueInHandle (#70832)

InterlockedCompareExchangeT has to be called on a raw Object* to make the GC stress infrastructure happy.

src/coreclr/vm/loaderallocator.cpp

@@ -920,7 +920,7 @@ OBJECTREF LoaderAllocator::CompareExchangeValueInHandle(LOADERHANDLE handle, OBJ
     {
         OBJECTREF *ptr = (OBJECTREF *)(((UINT_PTR)handle) - 1);
 
-        gc.previous = InterlockedCompareExchangeT(ptr, gc.value, gc.compare);
+        gc.previous = ObjectToOBJECTREF(InterlockedCompareExchangeT((Object **)ptr, OBJECTREFToObject(gc.value), OBJECTREFToObject(gc.compare)));
         if (gc.previous == gc.compare)
         {
             ErectWriteBarrier(ptr, gc.value);