test,benchmark,doc: enable dot-notation rule

This enables the eslint dot-notation rule for all code instead of
only in /lib.

PR-URL: https://github.com/nodejs/node/pull/18749


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matheus Marchini <matheus@sthima.com>