win, build: fix build time on Windows

Sets MSBuild experimental switches to make it build in parallel project
files generated by gyp 0.5.0.

Fixes: https://github.com/nodejs/node/issues/35921

PR-URL: https://github.com/nodejs/node/pull/35932


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>