Merge pull request #60283 from zoecarver/frt-static-extension

[cxx-interop] Fix static extensions on foreign reference types.

lib/SIL/IR/SILFunction.cpp

@@ -752,6 +752,9 @@ bool SILFunction::hasDynamicSelfMetadata() const {
       selfTy = dynamicSelfTy.getSelfType();
   }
 
+  if (selfTy.isForeignReferenceType())
+    return false;
+
   return !!selfTy.getClassOrBoundGenericClass();
 }