Add EKS ClusterClass example and e2e test

[valaparthvi]

kind/enhancement

What this PR does / why we need it:

This PR makes the following change:

1. Add EKS ClusterClass example to be consumed by e2e and documentation. The template is based on templates introduced in ✨ Add ClusterClass support for EKS clusters kubernetes-sigs/cluster-api-provider-aws#5375.
2. Add EKS ClusterClass e2e test
3. Remove EKS cluster e2e test

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1705

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests - 🟢 https://github.com/rancher/turtles/actions/runs/17788964385/job/50562001146#step:9:818
• Remove focus on test and fleet branch name

[anmazzotti]

I miss the testing entirely. I would expect the long e2e test suite to include this new Class.
Also a related issue to document it in turtles-docs.

[valaparthvi]

I miss the testing entirely. I would expect the long e2e test suite to include this new Class.

Also a related issue to document it in turtles-docs.

I will be adding them. This PR is still a WIP, I'm sorry I didn't realise it requested a review already 😅 I think it's because I didn't put it in draft.

[alexander-demicev]

thanks!

[furkatgofurov7]

Thank you for the PR. I would love to see a cleaner commit history, however changes LGTM.

[valaparthvi]

Thank you for the PR. I would love to see a cleaner commit history, however changes LGTM.

I waited on squashing the commits in case new changes were requested to the PR. It's done now.