feat: RFC-0759 break apart iOS auto-linking

[blakef]

Summary:

Instead of native_modules serving use_native_modules!(config), users should now use autolink_native_modules!() from autolinking.rb.

This is being used in react-native-community/template#7

[!WARNING] This needs to wait for nightlies to land with the updated TypeScript definitions, expect CI to fail until then.

Test Plan:

Checklist

• [ ] Documentation is up to date to reflect these changes.
• [ ] Follows commit message convention described in CONTRIBUTING.md