Update ESLint uses to reference eslint-plugin-monorepo explicitly (#54519)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54519

**Background**

`react-native/eslint` was relocated and renamed to `react-native/eslint-plugin-monorepo` in D76088698.

**This diff**

This updates all call sites to correctly address the `react-native/eslint-plugin-monorepo` package, enabling us to remove the monorepo itself from fbsource's `package.json#workspaces` (which was the only reason this kept working before).

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D86869721

fbshipit-source-id: 00e23eb902874f54bb7bd3cb967946197dc1a010