[Helix] Move helix arm run to ci

[HaoK]

This should make helix passing on arm queues required for PR checks

[dougbu]

@Pilchie @HaoK I thought the idea was to pare down the Helix pipeline to just the ARM builds and watch that for at least a few days before making it mandatory? Fine if this was the decision.

In any case, I'd prefer we weren't running the x64 Helix job until it's shaded less red.

[HaoK]

In the past week or so I haven't actually seen the arm tests fail while tweaking the helix stuff. I just took a brief manual look at the arm runs for the past few days and I haven't seen any real failures so I'm optimistic. Maybe we can try turning it on over the weekend and I can monitor things while its lower traffic, its easy to back out anyways if ends up blocking PRs.

Now that the mac queue is gone, and the log typo has been fixed I've actually seen consistent green helix checks since yesterday on my PRs!

[Pilchie]

Let's try this and see how it goes. We should also send a mail to the team describing the change, and who to talk to if there are issues.

[Pilchie]

Let's try this and see how it goes. We should also send a mail to the team describing the change, and who to talk to if there are issues.

[HaoK]

Wish me luck, I told people to contact me directly if things blow up