Fabric: Fixes LayoutConformanceView not work (#48253)

Summary:
Fixes iOS LayoutConformanceView not work, seems caused by #48188. NickGerleman can you help to review please?

## Changelog:

[IOS] [FIXED] - Fabric: Fixes LayoutConformanceView not work

Pull Request resolved: #48253

Test Plan:
Before:
![image](https://github.com/user-attachments/assets/ca1f12c1-825b-4167-849d-b88f8ec54e21)

After:
![image](https://github.com/user-attachments/assets/c81b3192-8552-4147-b3af-3a8920a91d6c)

Reviewed By: NickGerleman, cipolleschi

Differential Revision: D67195461

Pulled By: javache

fbshipit-source-id: 2f45d9a9aa2389ba7cb89e601e7225dbef4f7abf

packages/react-native/React/Fabric/Mounting/RCTComponentViewFactory.mm

@@ -19,6 +19,7 @@
 #import <react/renderer/componentregistry/ComponentDescriptorProviderRegistry.h>
 #import <react/renderer/componentregistry/componentNameByReactViewName.h>
 #import <react/renderer/componentregistry/native/NativeComponentRegistryBinding.h>
+#import <react/renderer/components/view/LayoutConformanceComponentDescriptor.h>
 #import <react/renderer/core/PropsParserContext.h>
 #import <react/renderer/core/ReactPrimitives.h>
 
@@ -75,6 +76,8 @@ + (RCTComponentViewFactory *)currentComponentViewFactory
     componentViewFactory = [RCTComponentViewFactory new];
     [componentViewFactory registerComponentViewClass:[RCTRootComponentView class]];
     [componentViewFactory registerComponentViewClass:[RCTParagraphComponentView class]];
+    componentViewFactory->_providerRegistry.add(
+        concreteComponentDescriptorProvider<LayoutConformanceComponentDescriptor>());
 
     componentViewFactory->_providerRegistry.setComponentDescriptorProviderRequest(
         [](ComponentName requestedComponentName) {

packages/react-native/ReactCommon/react/renderer/components/view/LayoutConformanceShadowNode.h

@@ -16,9 +16,13 @@ namespace facebook::react {
 constexpr const char LayoutConformanceShadowNodeComponentName[] =
     "LayoutConformance";
 
-using LayoutConformanceShadowNode = ConcreteShadowNode<
-    LayoutConformanceShadowNodeComponentName,
-    YogaLayoutableShadowNode,
-    LayoutConformanceProps>;
+class LayoutConformanceShadowNode final
+    : public ConcreteShadowNode<
+          LayoutConformanceShadowNodeComponentName,
+          YogaLayoutableShadowNode,
+          LayoutConformanceProps> {
+ public:
+  using ConcreteShadowNode::ConcreteShadowNode;
+};
 
 } // namespace facebook::react