Add yoga to app search paths (#47195)

Summary:
Pull Request resolved: #47195

When a user wants to create a Fabric Component i their app (not in a separate library) the app fails to build because:
- The custom component has to inherit from `RCTViewComponentView`
- `RCTViewComponentView` imports `ViewProps.h`
- `ViewProps.h` imports `HostPlatformViewProps.h`
- `HostPlatformViewProps.h` imports `BaseViewProps.h`
- `BaseViewProps.h` imports `YogaStylableProps.h`

which is a Yoga private header and the App has not visibility over it.

It is also not possible to fix this issue with forward declaring the `YogaStylableProps`, because `BaseViewProps` inherit from the yoga's props, so the compiler needs the full declaration of `YogaStylableProps` to work

This needs to be picked in 0.76

## Changelog
[iOS][Fixed] - Give apps access to Yoga headers

Reviewed By: blakef

Differential Revision: D64925222

fbshipit-source-id: e724076bbfb0a678948340dfab2ce609e6509533

packages/react-native/Libraries/AppDelegate/React-RCTAppDelegate.podspec

@@ -64,7 +64,7 @@ Pod::Spec.new do |s|
     "CLANG_CXX_LANGUAGE_STANDARD" => rct_cxx_language_standard(),
     "DEFINES_MODULE" => "YES"
   }
-  s.user_target_xcconfig   = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/Headers/Private/React-Core\""}
+  s.user_target_xcconfig   = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/Headers/Private/React-Core\" \"$(PODS_ROOT)/Headers/Private/Yoga\""}
 
   s.dependency "React-Core"
   s.dependency "RCT-Folly", folly_version