chore: Deprecate and remove aws-node-termination-handler chart in favor of upstream chart

[bryantbiggs]

Issue

• Resolves aws-node-termination-handler in current repository is outdated  #1081
• Resolves New chart has not been published for aws-node-termination-handler version v1.20.0 #1014
• Resolves aws-node-termination-handler release v1.20.0 #1004
• Resolves Enable Prometheus metrics without ServiceMonitor #959
• Resolves policy/v1beta1 has been deprecated since kubectl version 1.25 #856
• Resolves aws-node-termination-handler - Add daemonset annotations #841
• Resolves New charts are not being published #709
• Resolves Unable to upgrade chart version from 0.16.0 to 0.18.1 #727
• Resolves node-termination-handler servicemonitor has the wrong labels #722
• Resolves [aws-node-termination-handler] patch-release is backwards incompatible #546

Description of changes

• Deprecate and remove aws-node-termination-handler chart in favor of upstream chart which is being published directly to Public ECR

Checklist

• Added/modified documentation as required (such as the README.md for modified charts)
• Incremented the chart version in Chart.yaml for the modified chart(s)
• Manually tested. Describe what testing was done in the testing section below
• Make sure the title of the PR is a good description that can go into the release notes

Testing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[bryantbiggs]

cc @aws/ec2-guacamole