test: add windows and C++ coverage

Collect Windows and C++ coverage. Configure codecov so that
comments are more concise and are only left when coverage
varies.

PR-URL: https://github.com/nodejs/node/pull/35670
Fixes: https://github.com/nodejs/node/issues/35696
Refs: https://github.com/nodejs/node/pull/35653
Refs: https://github.com/nodejs/node/issues/35646


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>