[document-picker] Update to use codesigning variables in entitlements

[EvanBacon]

Why

Utilize the codesigning variables in the entitlements file to dynamically link credentials at build time. [Discovered here](AppIdentifierPrefix is different in main app and extension - https://developer.apple.com/forums/thread/118773?answerId=674983022#674983022). I searched around github and found that others have used this same technique in their iOS projects.

How

Utilize variables $(TeamIdentifierPrefix)$(CFBundleIdentifier)

• Change process.env.EXPO_APPLE_TEAM_ID -> $(TeamIdentifierPrefix) -(Xcode converts to)-> XXXXXX.
• Change config.ios.bundleIdentifier -> $(CFBundleIdentifier) -(Xcode converts to)-> foo.bar.app This one didn't work for capability identifier registration.

Test Plan

• EAS Build
• EAS Submit

Resolved entitlements use the correct team ID

Checklist

• Documentation is up to date to reflect these changes (eg: https://docs.expo.dev and README.md).
• This diff will work correctly for expo build (eg: updated @expo/xdl).
• This diff will work correctly for expo prebuild & EAS Build (eg: updated a module plugin).

[bbarthec]

Looking solid 👍