Add torch nightly builds pipeline for aarch64 linux

[snadampal]

There are no aarch64_linux nightly wheels here:
https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html

However, I see the wheels are published for PT1.12.1 release on Aug 5th, so, the issue with the nightly builds might be with some infrastructure not the codebase.

cc @seemethere @malfet @pytorch/pytorch-dev-infra

[malfet]

Moving to pytorch/pytorch, but they are not broken, just missing (we do not have nightly pipeline setup for aarch64 builds at the momnet)

[seemethere]

Our current infrastructure model doesn't support arm64, we have plans to add it in the future but it's a very low priority for us right now unfortunately.

[snadampal]

I think we had the nightly builds available during PyTorch 1.10 timeline. Has something been changed?
Hi @malfet Could you please elaborate what you mean by

but they are not broken, just missing

Does it mean the CI is alive and builds are working, it's just the wheel publishing is the gap? Thanks!

[malfet]

I think we had the nightly builds available during PyTorch 1.10 timeline.

There is a script one can use to schedule a build of latest snapshot, but there were never a CI pipeline.

Does it mean the CI is alive and builds are working, it's just the wheel publishing is the gap?

See @seemethere reply above. There were never a CI pipeline for aarch64-Linux.

[powderluv]

Would it be possible to add the aarch64 nightly whls? We use the latest nightly PyTorch builds with torch-mlir (so we can keep up with latest fixes in upstream) and are unable to install the nightly aarch64 builds. All cloud providers now have ARM64 instances we could use. Thank you.