Upgrade CI binary build runner from 4x to 12xlarge (#87727)
It currently takes a whopping 2h30m just to build PyTorch binary for every PR and commit. Pushing it to 12xlarge reduces the time to 1h40m https://github.com/pytorch/pytorch/actions/runs/3323869550/jobs/5494754029, not exactly a linear (and fair) trade, but good enough to reduce this long pole.
I'll monitor the queue for 12xlarge after this change.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87727
Approved by: https://github.com/kit1980, https://github.com/malfet
