build: add test-doc to test target

This commit adds the test-doc target to the test recipe so that docs are
built and linters run. This used to happen but was removed at some
point.

PR-URL: https://github.com/nodejs/node/pull/22294


Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>