Fabric: Disabling ScrollView's contentOffset propagation to ShadowNode tree

Summary:
This diff disables the feature that propagates ScrollView's content offset to ShadowNode hierarchy making measuring content-offset-aware.
Seems that feature breaks FlatList because it does not expect measure calls to be content-offset-aware. We need to validate which legacy `measure*` calls should be content-offset-aware and which should not, and then verify that actual feature works (it's not clear why it worked with FlatList before) well before re-enabling this.

For now, the most safer choice is to disable this feature because I don't think some call sites actually rely on it now.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D18777939

fbshipit-source-id: 20d6c1081e7d2cc3b5a7a172ed947a9ae9cdfaab

Author: shergin

React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm

@@ -196,13 +196,17 @@ - (ScrollViewMetrics)_scrollViewMetrics
 
 - (void)_updateStateWithContentOffset
 {
+  /*
+  Propagation ScrollView's contentOffset value to ShadowNode tree is temporarily disabled.
+
   auto contentOffset = RCTPointFromCGPoint(_scrollView.contentOffset);
 
   _state->updateState([contentOffset](ScrollViewShadowNode::ConcreteState::Data const &data) {
     auto newData = data;
     newData.contentOffset = contentOffset;
     return newData;
   });
+  */
 }
 
 - (void)prepareForRecycle