Include Alpine in target platforms

[charliermarsh]

Summary

This PR ensures that we publish VS Code extensions for the alpine-x86 and alpine-arm64 target platforms.

See https://code.visualstudio.com/api/working-with-extensions/publishing-extension#platformspecific-extensions for details:

The currently available platforms are: win32-x64, win32-arm64, linux-x64, linux-arm64, linux-armhf, alpine-x64, alpine-arm64, darwin-x64, darwin-arm64 and web.

Test Plan

Performed a dry run, and verified that Ruff selected the correct musl wheel for x86:

And again for arm:

[charliermarsh]

Looks good to me if it works

That's my attitude too lol

[charliermarsh]

Appears to have worked with a nightly build: