Merge pull request #34436 from ivanvc/master

etcd: mark coverage job as blocking

Author: k8s-ci-robot

config/jobs/etcd/etcd-presubmits.yaml

@@ -831,7 +831,6 @@ presubmits:
         kubernetes.io/arch: arm64
 
   - name: pull-etcd-coverage-report
-    optional: true # remove once the job is stable
     cluster: eks-prow-build-cluster
     always_run: true
     branches: