Update CI configs to be prepared for the MacOS fleet expansion.

Failed in 1m 30s
:mac: macOS arm64curl -sS https://raw.githubusercontent.com/fweikert/continuous-integration/ms/buildkite/bazelci.py?1720213600 -o bazelci.py && python3 bazelci.py runner --task=macos_arm64 --http_config=https://raw.githubusercontent.com/fweikert/bazel/macos_v2/.bazelci/postsubmit.yml
Waited 10s
·
Ran in 47s
Total Job Run Time: 1m 55s