Add EMR on EKS compositions and examples

[nabuskey]

What does this PR do?

Adds examples and compositions for EMR on EKS.

Motivation

Recently we merged EMR on EKS into the ACK AWS Provider. However, the setup / prerequisite for it is a pain. I've captured required steps into compositions for easier consumption.

More

• [ ] Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)

• [ ] Yes, I have added a new example under examples to support my PR

• [ ] Yes, I have updated the docs for this feature

• [ ] Yes, I have linked to an issue or feature request (applicable to PRs that solves a bug or a feature request)

Note:

• Not all the PRs require examples and docs
• We prefer small, well tested pull requests. Please ensure your pull requests are self-contained, and commits are squashed

For Moderators

• [ ] E2E Test successfully complete before merge?

Additional Notes