YGEdge -> yoga::Edge (#1461)

Summary:
X-link: https://github.com/facebook/react-native/pull/41391

Pull Request resolved: https://github.com/facebook/yoga/pull/1461

Converts usages of `YGEdge` within internal APIs to `yoga::Edge` scoped enum.

With the exception of YGUnit which is in its own state of transition, this is the last public yoga enum to need to be moved to scoped enum form for usages internal to the Yoga public API.

Changelog: [internal]

Reviewed By: rshest

Differential Revision: D51152779

fbshipit-source-id: 06554f67bfd7709cbc24fdd9a5474e897e9e95d8

yoga/node/LayoutResults.cpp

@@ -13,11 +13,11 @@
 namespace facebook::yoga {
 
 bool LayoutResults::operator==(LayoutResults layout) const {
-  bool isEqual = yoga::inexactEquals(position, layout.position) &&
+  bool isEqual = yoga::inexactEquals(position_, layout.position_) &&
       yoga::inexactEquals(dimensions_, layout.dimensions_) &&
-      yoga::inexactEquals(margin, layout.margin) &&
-      yoga::inexactEquals(border, layout.border) &&
-      yoga::inexactEquals(padding, layout.padding) &&
+      yoga::inexactEquals(margin_, layout.margin_) &&
+      yoga::inexactEquals(border_, layout.border_) &&
+      yoga::inexactEquals(padding_, layout.padding_) &&
       direction() == layout.direction() &&
       hadOverflow() == layout.hadOverflow() &&
       lastOwnerDirection == layout.lastOwnerDirection &&