[expo-updates] Add expo-updates cli fingerprint:generate command

[wschurman]

Why

We need the @expo/fingerprint package version to match that of expo-updates (the fingerprint generated during the build from #26901) when we generate a fingerprint in eas-cli for the eas update command. The only way I can think to do this is make a command in expo-updates that eas-cli calls into to get the version of @expo/fingerpring being used by the project (and build process). This is similar to how we call npx expo from eas-cli to get the correct versioned CLI.

How

Add new command, yarn expo-updates fingerprint:generate --platform ios that just runs fingerprint. This has the secondary benefit of consolidating the workflow detection code to one place as well so there aren't any inconsistencies.

Test Plan

yarn expo-updates fingerprint:generate --platform ios
see JSON fingerprint output stringified

Checklist

• Documentation is up to date to reflect these changes (eg: https://docs.expo.dev and README.md).
• Conforms with the Documentation Writing Style Guide
• This diff will work correctly for npx expo prebuild & EAS Build (eg: updated a module plugin).