[codemod] fix: next-lint-to-eslint-cli did not handle `'next'` plugin (#85749)
Codemod `next-lint-to-eslint-cli` did not handle `extends: ['next']` in
legacy ESLint config.
x-ref:
https://github.com/vercel/next.js/issues/85244#issuecomment-3482558412
Fixes #85244