Remove legacy addons

[rifelpet]

These have been deprecated for 5 years. Anyone still using the channels command to apply manifests from this directory can update the path in the command arguments to reference an older kops release branch

Support for legacy addons was removed in kops clusters running k8s 1.23 #12064

/hold for feedback

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[hakman]

/lgtm

[hakman]

/override tests-e2e-scenarios-bare-metal

[k8s-ci-robot]

@hakman: /override requires failed status contexts, check run or a prowjob name to operate on.
The following unknown contexts/checkruns were given:

• tests-e2e-scenarios-bare-metal

Only the following failed contexts/checkruns were expected:

• EasyCLA
• build-linux-amd64
• build-linux-arm64
• build-macos-amd64
• build-windows-amd64
• deploy/netlify
• pull-kops-build
• pull-kops-e2e-k8s-aws-amazonvpc
• pull-kops-e2e-k8s-aws-calico
• pull-kops-e2e-k8s-gce-cilium
• pull-kops-e2e-k8s-gce-ipalias
• pull-kops-test
• pull-kops-verify-boilerplate
• pull-kops-verify-generated
• pull-kops-verify-gofmt
• pull-kops-verify-golangci-lint
• pull-kops-verify-gomod
• pull-kops-verify-govet
• tide
• verify-amd64
• verify-arm64

If you are trying to override a checkrun that has a space in it, you must put a double quote on the context.

In response to this:

/override tests-e2e-scenarios-bare-metal

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[hakman]

/override tests-e2e-scenarios-bare-metal

[k8s-ci-robot]

@hakman: Overrode contexts on behalf of hakman: tests-e2e-scenarios-bare-metal

In response to this:

/override tests-e2e-scenarios-bare-metal

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.