Add Windows ARM64 temporary test machines

[joaocgreis]

I will add two ARM64 Windows test machines to Jenkins if there are no objections. For now, these will be used to have some initial CI support and start configuring Jenkins. I plan to add the test job to the daily jobs, but not yet to node-test-commit.

These are actually two laptops sitting in my office. They won't be very fast, but enough for now.

[joaocgreis]

#1795 landed with Ansible support, and 3 Jenkins jobs have been created:

• https://ci.nodejs.org/view/All/job/build-release-windows-arm64/ (Windows unofficial builds unofficial-builds#2)
• https://ci.nodejs.org/view/All/job/node-test-commit-windows-arm64/
• https://ci.nodejs.org/view/All/job/nodegyp-test-commit-arm64/

I didn't yet add the test-commit job to the node-daily job. Since the node-gyp in npm does not yet have support for ARM64, all addons tests fail. When a node-gyp release with support lands in node, I will add the job.