chore: Deprecate `aws-for-fluent-bit` chart in favor of publishing to Public ECR from upstream repo

[bryantbiggs]

Issue

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Description of changes

• Deprecate aws-for-fluent-bit chart in favor of publishing to Public ECR from upstream repo

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.