removes unused UsingDeprecatedAPIAppsV1Beta1 and UsingDeprecatedAPIAppsV1Beta2 alerts

[p0lyn0mial]

Since apps/v1beta1 and apps/v1beta2 are disabled in Kube 1.17 we can safely remove the mentioned alerts as any attempt to create a resource will immediately return an error.

I run the following commands on a quite recent cluster:

k get --raw /apis/apps/v1beta2
k get --raw /apis/apps/v1beta1

Error from server (NotFound): the server could not find the requested resource

Client/Server version:

k version                         
Client Version: version.Info{Major:"", Minor:"", GitVersion:"v0.0.0-master+$Format:%h$", GitCommit:"$Format:%H$", GitTreeState:"", BuildDate:"1970-01-01T00:00:00Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"17+", GitVersion:"v1.17.0", GitCommit:"8a9ae19", GitTreeState:"clean", BuildDate:"2019-12-21T07:03:31Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"}

[p0lyn0mial]

There's also one additional alert that monitors resources (except ingresses) in extensions/v1beta1. As of 1.17 that group serves only a single resource (ingress). Given that a default cluster doesn't have any resources of that type we could disable that group too and remove the outstanding alert.

/cc @deads2k @sttts

[p0lyn0mial]

/cc @lilic

[sttts]

/lgtm
/approve

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[p0lyn0mial]

/retest

[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.