Use <stack-name>-<instance-id> for buildkite agent names
Use <stack-name>-<instance-id> for buildkite agent names

holmesjr/elastic-ci-stack-for-aws,caremonkey/buildkite-aws-elastic-stack,buildkite/elastic-ci-stack-for-aws,holmesjr/elastic-ci-stack-for-aws,caremonkey/buildkite-aws-elastic-stack