[macos] run macos cpp tests on apple silicon

[aslonnie]

disable all java tests. ray java not supported on apple silicon yet.

[gemini-code-assist]

Code Review

This pull request updates the Buildkite CI configuration to run the C++ and Java tests on a macos-arm64 instance. While this is a good step towards supporting Apple Silicon, the associated test script ci/ray_ci/macos/macos_ci.sh contains a hardcoded JAVA_HOME path. This path may not be valid on the new arm64 architecture, which could lead to build failures. I've added a comment highlighting this risk and suggesting a more robust way to set the Java home directory.

[aslonnie]

testing here: https://buildkite.com/ray-project/postmerge-macos/builds/7817

[github-actions]

This pull request has been automatically marked as stale because it has not had
any activity for 14 days. It will be closed in another 14 days if no further activity occurs.
Thank you for your contributions.

You can always ask for help on our discussion forum or Ray's public slack channel.

If you'd like to keep this open, just leave any comment, and the stale label will be removed.

[aslonnie]

new attempt: https://buildkite.com/ray-project/postmerge-macos/builds/8388#_

just disable java.. it does not work anyways. and no one should be using new ray version with intel silicon macos any more.

[github-actions]

This pull request has been automatically marked as stale because it has not had
any activity for 14 days. It will be closed in another 14 days if no further activity occurs.
Thank you for your contributions.

You can always ask for help on our discussion forum or Ray's public slack channel.

If you'd like to keep this open, just leave any comment, and the stale label will be removed.

[aslonnie]

new attempt: https://buildkite.com/ray-project/postmerge-macos/builds/8752