Argo workflows on EKS example and doc

[victorgu-github]

What does this PR do?

Argo workflows on EKS example
#41

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Motivation

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• 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]

Good work on this PR Victor! It looks great apart form few minor comments.
I think it would be good if you could add this Argo Workflow addon to EKS Blueprints as an add-on and refer in this pattern.

[vara-bonthu]

Two minor comments and then we are good for merge

[vara-bonthu]

LGTM