feat: migrate the eas secrets to github secrets

[hellohublot]

[what-the-diff[bot]]

PR Summary

• Updated Android Release Workflow The team has added a new environmental variable for the Android release workflow entitled JPUSH_KEY. This is reflected in an updated .env.expo file that now contains the android/keys.secret.

• Updated iOS Release Workflow Similarly, for the iOS release workflow, a new environmental variable IOS_SECRET is now present. This change is also recorded in an updated .env.expo file.

These changes allow for better configuration management during the release process of their respective platforms; ensuring correct keys are used in each environment. Both updates add an extra layer of security and flexibility to the release process.