[ext-code-space] Restore tagging of Code objects in heap snapshot

The heap snapshot generator is meant to apply descriptive names to Code
objects, but was using CodeDataContainer instead. Attempting to set the
name of the CodeDataContainer instances did nothing because they already
had the name "system / CodeDataContainer".

Bug: v8:11880
Change-Id: If7bd115bde36386d283d319c1ee28df565a39569
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3498849Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#79368}

src/profiler/heap-snapshot-generator.cc

@@ -1369,10 +1369,10 @@ void V8HeapExplorer::ExtractSharedFunctionInfoReferences(
     HeapEntry* entry, SharedFunctionInfo shared) {
   std::unique_ptr<char[]> name = shared.DebugNameCStr();
   if (name[0] != '\0') {
-    TagObject(shared.GetCode(),
+    TagObject(FromCodeT(shared.GetCode()),
               names_->GetFormatted("(code for %s)", name.get()));
   } else {
-    TagObject(shared.GetCode(),
+    TagObject(FromCodeT(shared.GetCode()),
               names_->GetFormatted("(%s code)",
                                    CodeKindToString(shared.GetCode().kind())));
   }