Add RCTDevSupportHeaders to React Umbrella (facebook#55974)

Summary:
Pull Request resolved: facebook#55974

Add RCTDevSupportHeaders in React Umbrella

This is a port to main of facebook#55969

## Changelog:
[Internal] -

Reviewed By: fabriziocucci

Differential Revision: D95550095

fbshipit-source-id: 193d0d2c85ad074c73cf37a2870ccadcc877b290

Author: cipolleschi

packages/react-native/scripts/ios-prebuild/templates/React-umbrella.h

@@ -88,6 +88,7 @@
 #import <React/RCTDevMenu.h>
 #import <React/RCTDevSupportHttpHeaders.h>
 #import <React/RCTDevSettings.h>
+#import <React/RCTDevSupportHttpHeaders.h>
 #import <React/RCTDevToolsRuntimeSettingsModule.h>
 #import <React/RCTDeviceInfo.h>
 #import <React/RCTDiffClampAnimatedNode.h>