Build CI system for Arm64 images

/kind feature

**Describe the solution you'd like**
[A clear and concise description of what you want to happen.]
As discussed in https://github.com/kubeflow/katib/pull/1935#issuecomment-1221458383, we are currently working on #1900 to support arm64 in all container images, although we don't have any CI systems to verify operations on the arm64 machine.

So, we need to build a CI system to verify operations on the arm64 machine using GitHub self-hosted runner with [AWS Graviton2 EC2 instance](https://aws.amazon.com/ec2/graviton/).

/cc @johnugeorge @anencore94

**Anything else you would like to add:**
[Miscellaneous information that will assist in solving the issue.]

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Start by reviewing issue #1900 and the discussion in pull request #1935 about arm64 image support. Then investigate GitHub self-hosted runners and AWS Graviton2 EC2; done means CI can verify Katib container operations on an arm64 machine.

Written by the indexing model from the issue text.