Feat: Observability on Spark on EKS

[victorgu-github]

What does this PR do?

add doc for Observability on Spark on EKS
also change ack for emr according to the addon change.

🛑 Please open an issue first to discuss any significant work and flesh out details/direction - we would hate for your time to be wasted.
Consult the CONTRIBUTING guide for submitting pull-requests.

Motivation

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 created another PR to add a new Add-on for Terraform EKS Blueprints repo (if applicable)
• Yes, I have updated the website/docs or website/blog section for this feature
• Yes, I ran pre-commit run -a with this PR. Link for installing pre-commit locally

For Moderators

• E2E Test successfully complete before merge?

Additional Notes

[vara-bonthu]

LGTM 👍🏼