Description of problem:
APIRemovedInNextReleaseInUse alerts for validatingwebhookconfigurations/customresourcedefinitions/ingresses/rolebindings/roles/priorityclasses, except priorityclasses, the issue with other resources are tracked with bug 1947719 and other bugs. this bug is only for priorityclasses.

search with ALERTS{alertname="APIRemovedInNextReleaseInUse"} with prometheus API
# token=`oc sa get-token prometheus-k8s -n openshift-monitoring`
# oc -n openshift-monitoring exec -c prometheus prometheus-k8s-0 -- curl -k -H "Authorization: Bearer $token" 'https://prometheus-k8s.openshift-monitoring.svc:9091/api/v1/query?query=ALERTS%7Balertname%3D%22APIRemovedInNextReleaseInUse%22%7D' | jq
{
  "status": "success",
  "data": {
    "resultType": "vector",
    "result": [
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "admissionregistration.k8s.io",
          "resource": "validatingwebhookconfigurations",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      },
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "apiextensions.k8s.io",
          "resource": "customresourcedefinitions",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      },
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "extensions",
          "resource": "ingresses",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      },
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "rbac.authorization.k8s.io",
          "resource": "rolebindings",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      },
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "rbac.authorization.k8s.io",
          "resource": "roles",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      },
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "APIRemovedInNextReleaseInUse",
          "alertstate": "firing",
          "group": "scheduling.k8s.io",
          "resource": "priorityclasses",
          "severity": "info",
          "version": "v1beta1"
        },
        "value": [
          1620977424.957,
          "1"
        ]
      }
    ]
  }
}

checked the resources version, they are v1
# for i in validatingwebhookconfigurations customresourcedefinitions ingresses rolebindings roles priorityclasses; do echo $i; oc explain $i | head -n 2; echo -e "\n"; done
validatingwebhookconfigurations
KIND:     ValidatingWebhookConfiguration
VERSION:  admissionregistration.k8s.io/v1


customresourcedefinitions
KIND:     CustomResourceDefinition
VERSION:  apiextensions.k8s.io/v1


ingresses
KIND:     Ingress
VERSION:  networking.k8s.io/v1


rolebindings
KIND:     RoleBinding
VERSION:  rbac.authorization.k8s.io/v1


roles
KIND:     Role
VERSION:  rbac.authorization.k8s.io/v1


priorityclasses
KIND:     PriorityClass
VERSION:  scheduling.k8s.io/v1


Version-Release number of selected component (if applicable):
# oc version
Client Version: 4.8.0-0.nightly-2021-05-13-180601
Server Version: 4.8.0-0.nightly-2021-05-13-180601
Kubernetes Version: v1.21.0-rc.0+6998007


How reproducible:
always

Steps to Reproduce:
1. see the description
2.
3.

Actual results:
APIRemovedInNextReleaseInUse alert for priorityclasses

Expected results:
no alert

Additional info:
alert: APIRemovedInNextReleaseInUse
expr: group by(group, version, resource) (apiserver_requested_deprecated_apis{removed_release="1.22"}) and (sum by(group, version, resource) (rate(apiserver_request_total[4h]))) > 0
for: 1h
labels:
  severity: info
annotations:
  message: Deprecated API that will be removed in the next version is being used. Removing the workload that is using the {{"{{$labels.group}}"}}.{{"{{$labels.version}}"}}/{{"{{$labels.resource}}"}} API might be necessary for a successful upgrade to the next cluster version. Refer to the apirequestcount.apiserver.openshift.io resources to identify the workload.