Fix box-shadow showing on top of subviews (#45935)

Summary:
Pull Request resolved: #45935

As title

Changelog: [Internal]

Reviewed By: joevilches

Differential Revision: D60925627

fbshipit-source-id: 3cc2703eb68201fd02063738f8896b87a938658c

Author: jorge-cab

packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm

@@ -889,7 +889,7 @@ - (void)invalidateLayer
   if (!_props->boxShadow.empty()) {
     _boxShadowLayer = [CALayer layer];
     [self.layer addSublayer:_boxShadowLayer];
-    _boxShadowLayer.zPosition = CGFLOAT_MIN;
+    _boxShadowLayer.zPosition = _borderLayer.zPosition;
     _boxShadowLayer.frame = RCTGetBoundingRect(_props->boxShadow, self.layer.frame.size);
 
     UIImage *boxShadowImage = RCTGetBoxShadowImage(