fix: terminate the instances instead of stopping them

[kayman-mk]

Description

Trigger the panic stop resulted in you are not allowed to stop spot instances. As we want to get rid of the whole instance, stopping is wrong. We need to terminate the instance, which works for spot instances too.

Verification

Manually verified in the HL environment.

Checklist

• [x] My code follows the style guidelines of the project
• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation

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[kayman-mk]

/finish