clamp max interval to 3h for master release blocking jobs

Author: BenTheElder

config/jobs/kubernetes/sig-network/sig-network-kind.yaml

@@ -858,7 +858,7 @@ periodics:
     testgrid-tab-name: sig-network-kind, detect-local-interface-name-prefix
     description: Runs network tests using KIND against latest kubernetes master with a kubernetes-in-docker cluster and kube-proxy detectLocalMode=InterfaceNamePrefix
     testgrid-alert-email: antonio.ojea.garcia@gmail.com, widaly@microsoft.com
-- interval: 12h
+- interval: 3h
   name: ci-kubernetes-kind-cloud-provider-loadbalancer
   cluster: k8s-infra-prow-build
   labels:

config/jobs/kubernetes/sig-node/node-kubelet.yaml

@@ -1,7 +1,7 @@
 periodics:
 - name: ci-kubernetes-node-e2e-containerd
   cluster: k8s-infra-prow-build
-  interval: 4h
+  interval: 3h
   labels:
     preset-service-account: "true"
     preset-k8s-ssh: "true"

config/jobs/kubernetes/sig-release/release-branch-jobs/1.34.yaml

@@ -1172,7 +1172,7 @@ periodics:
     org: kubernetes
     path_alias: k8s.io/kubernetes
     repo: kubernetes
-  interval: 6h
+  interval: 3h
   labels:
     preset-dind-enabled: "true"
     preset-service-account: "true"