Cleanup scripts added

[vara-bonthu]

What does this PR do?

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• Cleanup script added for few blueprints
• Workshop code with cleanup script added

Closes #122 #117

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

[nabuskey]

Looks good. One suggestion I have is to use

set -o errexit
set -o pipefail

Just to make sure they fail early when more logic is needed in the future.