Summary:
Latest CLI requires `reactNativePath` to be explicitly set when `react-native` is not present under `node_modules` (which is the case when running from source).
Fixes#23936
This PR also updates CLI to latest version and removes private calls to `findPlugins` (it's now exposed under public interface).
We also remove custom `rn-cli.config.js` options that are no longer needed that we have `--reactNativePath`. I added them a month ago as a temporary workaround.
[GENERAL] [FIXED] - Internal - Update to the latest CLI
Pull Request resolved: https://github.com/facebook/react-native/pull/23940
Differential Revision: D14472633
Pulled By: cpojer
fbshipit-source-id: b7ea92ee130da6730aa0093265958aa1b8c2ab97