Summary:
Removes the `error-subclass-name` ESLint rule from `react-native/eslint-plugin`, and implements a new `require-extends-error` ESLint rule inside the React Native repository. This rule was only intended to be used for internal development of React Native.
This will change `react-native/eslint-plugin` to no longer provide the `error-subclass-name` rule.
NOTE: One behavior difference here is that I also implemented the desired behavior of checking classes that extend `Library.SomeError`.
Changelog:
[General][Removed] - `react-native/eslint-plugin` no longer provides the `error-subclass-name` rule.
Reviewed By: lunaleaps
Differential Revision: D39858882
fbshipit-source-id: 27b53216d77a15b3425bd9669dbc9d954c1c61da