Create a demo cadmium installation

[rfvermut]

• initially should create additional demo account in aws org, later - reuse it to avoid long deletions/creations
• should create GitRepo/EKS/ECR/ES, provision JenkinsX
• after demo should be deleted completely first via TF, then via cloud-nuke

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AWS Org level TF run (the one that creates Account/GitHub) should use IAM credentials, run from local machine and store state in S3 bucket/Dynamo.

AWS Account TF run should be done via AWS SSO provided credentials the same way.

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Things we want to demo:

• EKS on Spot Instances
• build sample Java app (https://github.com/riskfocus/cad3-java11) demonstrating Jenkins agents created dynamically
• promote sample app to "development" automatically and to "staging" manually via jx tool
• create PRs and demonstrate feature-branch dynamic environments
• demonstrate prometheus metric endpoint autodiscovery/operator?, create some graphs in Grafana
• demonstrate container logs in ES