doc(self-managed): eks upgrade module doc

[leiicamundi]

Description

This PR aims to document the upgrade process for the AWS EKS TF module, specifically addressing the major version bump of the EKS module that we are incorporating. It includes updating our AWS documentation to reflect the necessary changes and instructions for users during the upgrade process.

When should this change go live?

• This is part of a scheduled alpha or minor. (apply alpha or minor label)

PR Checklist

• My changes are for the next minor and are in /docs directory (aka /next/).
• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[Langleu]

Overall looks quite good, I like the references to the official docs to keep it simple on our side.

[leiicamundi]

Thanks for the review @Langleu, I've fixed all the issues spotted

[Langleu]

didn't add comments for all versions but applies to the other ones as well about the source reference

[Langleu]

looks good from my side.

[christinaausley]

@leiicamundi Can we go ahead and merge, or do you have additional changes coming?

[leiicamundi]

Hey @christinaausley, please wait until a patch is published on the EKS terraform module, then we will be good to merge it ;)

[Langleu]

release version was updated 👍

[akeller]

Since the description does not include any info about when to release this change, it will sit in the queue until something with priority must be released. If that's not your intention and you'd like a docs release sooner, please reach out on #ask-c8-documentation.

[Langleu]

thanks @akeller, the change didn't have a strict priority.
As with most Infrastructure, it's decapsulated from the actual software development. So, we're generally good with the docs release cycle.
Thanks for the heads up if we have something important in the future 🙇.