[Bug]: onesignal-expo-plugin dosen't allow to read EXPO_PUBLIC_ var env

[jbcrestot]

What happened?

Hello,

I'm using a managed workflow and building with eas; I'm taking advantage of environment variables of expo (aka EXPO_PUBLIC_*) to change bundler identifier like this :
app.config.ts

const appConfig: AppConfig = {
    bundleIdentifier: process.env.EXPO_PUBLIC_BUNDLER_IDENTIFIER as string
  }

return {
  name: "xxx",
  ios: {
      bundleIdentifier: appConfig.bundleIdentifier,
  }
}

while the build on eas works find, for development we need to start the server and see what happens (I'm logging appConfig for clarity purposes):
APP_VARIANT=development npx expo start --reset-cache

appConfig {
  bundleIdentifier: undefined
}
AssertionError [ERR_ASSERTION]: Missing 'ios.bundleIdentifier' in app config.
error Command failed with exit code 1.

to illustrate more, see what happens when I set the bundler identifier manually :
app.config.ts

return {
  name: "xxx",
  ios: {
      bundleIdentifier: "my.identifier",
  }
}

then start the server :
APP_VARIANT=development npx expo start --reset-cache

appConfig {
  bundleIdentifier: undefined,
}
Starting project at /Users/jb/Projets/mobile
env: load .env.local
env: export EXPO_PUBLIC_BUNDLER_IDENTIFIER [...] EXPO_PUBLIC_ONE_SIGNAL_APP_ID
appConfig {
  bundleIdentifier: 'my.identifier',
}

>>> Then the server starts normally

by the way, I'm doing the same thing for Android but it does not cause the problem.
app.config.ts

android: {
      package: appConfig.bundleIdentifier,
}

Steps to reproduce?

1. npx expo install onesignal-expo-plugin
2. yarn add react-native-onesignal
3. create a file .env and add EXPO_PUBLIC_BUNDLER_IDENTIFIER = com.onsignal.test
4. modify app.config.ts to use it :

return {
  name: "xxx",
  ios: {
      bundleIdentifier: appConfig.bundleIdentifier,
  }
}

5. npx start start

### What did you expect to happen?

The expo server starts normally

### OneSignal Expo SDK version

"onesignal-expo-plugin": "^2.0.3",
"react-native-onesignal": "^5.2.3",

### Platform

iOS, Android

### Relevant log output

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct