fix: mirror binaries

This patch adds upload:* targets to the project that will upload the binaries and put them in the GitLab generic package registry.

This requires a ~/.netrc with a api token setup for gitlab.arm.com.

To upload all binaries perform the following:

for TARGET in $(bazelisk query 'upload:*'); do
    bazelisk run --ui_event_filters -INFO -- "${TARGET}"
done

Things to do in the future:

• Create a multirun upload target that does the upload in parallel
• Add a manually triggered CI job that does the upload
  • This will need a deploy token with only package registry access

For now, a manual upload has been done help with outages.