Refactor AWS CloudFormation cluster update

[yashtandon113]

Link to the documentation page or resource

https://antmedia.io/docs/guides/clustering-and-scaling/aws/updating-ams-with-cloudformation/

Describe the bug

We need to revisit this document to ensure a smooth upgrade of the CloudFormation cluster on AWS. There is a blogpost for that as well.

We need to modify the document according to the use of launch templates now instead of launch configurations.

Customer raised this as well:

https://github.com/orgs/ant-media/discussions/6477

[Mohit-3196]

Merged #382