[test] Allow running `lint-eslint` on a specific directory (#82009)
`pnpm lint-eslint` no longer has a default pattern. This allows running it on a sub-directory in the monorepo e.g. `pnpm lint-eslint packages/next/src/next-devtools`
`lint-no-typescript` (and therefore CI) still defaults to `pnpm lint-eslint .`