aws-cloudwatch-actions: add EC2 actions

[cyuste]

Add EC2 actions to alarms, like described here

Use Case

See this ticket. The proposed solution by @IndikaUdagedara looks correct to me

Proposed Solution

Create new EC2Action class and a helper for reboot, recover, etc actions

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

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This is a 🚀 Feature Request

[github-actions]

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