Support dispatching `make-release-artifacts` workflow manually

Add support for dispatching the make-release-artifacts workflow manually.

In rare cases, make-release-artifacts might not be working as expected, or it fails, but somehow the github release is still created. This causes a situation where we can no longer produce new build artifacts, but we also can't publish to npm or vscode marketplace with the publish-release because there are no artifacts. (like in this recent build failure).

To mitigate that, I had to manually build the artifact locally and upload it to the release, then rerun publish-release. I'd like to avoid needing to do this.

Considerations:

• we really don't want to support rerunning the job if npm or vscode marketplace already has the artifacts. That could result in a situation where the published artifact is different than the published version.
  • a cool extra feature could be that, if somehow someone deleted the release artifact, but we're published to npm, we could re-download the file from npm and put it on the release
• criteria would need to include:
  • version (i.e. the release name)
  • what git ref to use to build the release (because it probably shouldn't be master in case we've merged new code since then