Rename the last remaining usage of parentShadowView.tag to parentTag

Summary:
`parentShadowView.tag` was renamed to `parentTag` in D66656411. This one callsite is hidden behind an `#ifdef`, so it didn't produce a compile error.

Changelog: [Internal]

Differential Revision: D67203413

packages/react-native/ReactCommon/react/renderer/mounting/Differentiator.cpp

@@ -1316,8 +1316,7 @@ static void calculateShadowViewMutations(
           DEBUG_LOGS({
             LOG(ERROR) << "Differ Branch 5: Founded reordered tags at indices: "
                        << oldIndex << ": " << oldChildPair << " and "
-                       << newChildPair << " with parent: ["
-                       << parentShadowView.tag << "]";
+                       << newChildPair << " with parent: [" << parentTag << "]";
           });
 
           updateMatchedPair(