Anthony Chansavang

[autoscaler][aws] cloudwatch alarm config placeholders are not replaced

2

### What happened + What you expected to happen Placeholders like `instance_id` in the cloudwatch alarm config are not replaced. I sent a PR [here](https://github.com/ray-project/ray/pull/46537) but looks like it fell...

[autoscaler][aws] Fix replace cloudwatch alarm config

2

placeholders like `instance_id` were not replaced ## Why are these changes needed? CW alarms were not created correctly when new instances were launched. ## Related issue number ## Checks -...