[lint] Disable linting using project config for tests (#66145)
During integration testing, previously, calls to `next build` could rely
on the project (the Next.js project) level ESLint configuration. In
order to correct this, a new `lint` option was added to `nextBuild` that
can be passed to enabled linting. If this is `false` or `undefined`, a
`--no-lint` argument will be passed to `next build` to prevent it from
running.
