Update Podfile for PRODUCTION=1 pod install (#34234)

Summary:
### Mentioned
- pr[main]: #33882
- discussion: reactwg/react-native-releases#21 (reply in thread)
- pr[0.69-stable]: #34098

Close: #33764

Saw the issue ago couple wks too: leotm/react-native-template-new-architecture#757
Fixed similarly: leotm/react-native-template-new-architecture#791

## Changelog

[iOS] [Changed] - Update Podfile to allow `PRODUCTION=1 pod install`

[CATEGORY] [TYPE] - Message

Pull Request resolved: #34234

Test Plan: Everything builds and runs as expected

Reviewed By: cortinico

Differential Revision: D38029117

Pulled By: cipolleschi

fbshipit-source-id: bdb58200a999cb66f1043a2feb670f9037c8e463

Author: leotm

scripts/react_native_pods.rb

@@ -37,7 +37,7 @@ def use_react_native! (
   path: "../node_modules/react-native",
   fabric_enabled: false,
   new_arch_enabled: ENV['RCT_NEW_ARCH_ENABLED'] == '1',
-  production: false,
+  production: ENV['PRODUCTION'] == '1',
   hermes_enabled: true,
   flipper_configuration: FlipperConfiguration.disabled,
   app_path: '..',