[vm, dynamic_modules] Inherit IsDynamicallyOverridden when creating method extractor

A method extractor (implementing get:foo for a method foo()) can be
used as an interface target. If original method can be overridden in
a dynamic module, then method extractor can be overridden too.
So IsDynamicallyOverridden flag should be copied when creating
a method extractor.

TEST=dynamic_modules_suite/tearoff_no_concrete_impl
Fixes #60116

Change-Id: I54439426645b3daf308d18da6e0d06602b9ec30f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/409360
Reviewed-by: Slava Egorov <[email protected]>
Commit-Queue: Alexander Markov <[email protected]>

Author: alexmarkov

runtime/vm/object.cc

@@ -4124,6 +4124,9 @@ FunctionPtr Function::CreateMethodExtractor(const String& getter_name) const {
   extractor.set_extracted_method_closure(closure_function);
   extractor.set_is_debuggable(false);
   extractor.set_is_visible(false);
+#if !defined(DART_PRECOMPILED_RUNTIME)
+  extractor.SetIsDynamicallyOverridden(IsDynamicallyOverridden());
+#endif
 
   signature ^= ClassFinalizer::FinalizeType(signature);
   extractor.SetSignature(signature);