fix(build): fixes React-RCTText build with RN 0.69.0 (#34064)

Summary:
Fixes iOS build for React-RCTText with RN 0.69.0, fixes #33976

PR contains changes from #33976 (comment)

PoC repo: https://github.com/ph4r05/poc-rn-34064

Related issues:
- expo/expo#16283
- #33815
- #33976

## Changelog

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[iOS] [Fixed] - Fix build for React-RCTText

Pull Request resolved: #34064

Reviewed By: cortinico

Differential Revision: D37420163

Pulled By: cipolleschi

fbshipit-source-id: 68a831bce9f449348d13e040a1ba12726a66667d

Author: ph4r05

React/Views/RCTShadowView.h

@@ -8,6 +8,8 @@
 #import <UIKit/UIKit.h>
 
 #import <React/RCTComponent.h>
+// Keeps RCTConvert.h here before yoga for clang module to generate correct header imports.
+#import <React/RCTConvert.h>
 #import <React/RCTLayout.h>
 #import <React/RCTRootView.h>
 #import <yoga/Yoga.h>