Add CI for Arm Linux

[metascroy]

@vctrmn added support for Arm linux in #2169 tested locally. Here we add CI for Arm linux to complement the Arm MacOS CI.

[pytorch-bot]

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[vctrmn]

@metascroy Great!

For my information, what kind of instances are used for linux.arm64.2xlarge? I am just curious about the CPU architecture (available flags from lscpu).

Would there be any way in the future to also test with TORCHAO_ENABLE_ARM_I8MM=1?

What do you think of github ARM runners that are in preview? (https://github.blog/news-insights/product-news/arm64-on-github-actions-powering-faster-more-efficient-build-systems/)

Just being curious

[metascroy]

@metascroy Great!

For my information, what kind of instances are used for linux.arm64.2xlarge? I am just curious about the CPU architecture (available flags from lscpu).

Would there be any way in the future to also test with TORCHAO_ENABLE_ARM_I8MM=1?

What do you think of github ARM runners that are in preview? (https://github.blog/news-insights/product-news/arm64-on-github-actions-powering-faster-more-efficient-build-systems/)

Just being curious

This is an AWS EC2 graviton2 instance (Amazon EC2 T4g), which I do not think supports I8MM. In future, we could try adding a graviton3 instance for i8mm.