Add 1.34 sig-node tests

Add node conformance test configuration for Kubernetes release 1.34 to match existing test patterns for 1.31, 1.32, and 1.33.

This includes:
- New periodic job ci-kubernetes-node-release-branch-1-34
- Image configuration file for 1.34 using cos-121-lts
- Testgrid integration on sig-node-release-blocking dashboard

Related to #35611

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: harche

config/jobs/kubernetes/sig-node/k8s-release-branches.yaml

@@ -149,3 +149,55 @@ periodics:
     testgrid-tab-name: node-conformance-release-1.33
     testgrid-alert-email: [email protected]
     description: Node conformance tests in release branch 1.33
+- name: ci-kubernetes-node-release-branch-1-34
+  cluster: k8s-infra-prow-build
+  interval: 24h
+  labels:
+    preset-service-account: "true"
+    preset-k8s-ssh: "true"
+  decorate: true
+  decoration_config:
+    timeout: 240m
+  extra_refs:
+  - org: kubernetes
+    repo: kubernetes
+    base_ref: release-1.34
+    path_alias: k8s.io/kubernetes
+    workdir: true
+  - org: kubernetes
+    repo: test-infra
+    base_ref: master
+    path_alias: k8s.io/test-infra
+  spec:
+    containers:
+      - image: gcr.io/k8s-staging-test-infra/kubekins-e2e:v20250925-95b5a2c7a5-master
+        command:
+        - runner.sh
+        args:
+          - kubetest2
+          - noop
+          - --test=node
+          - --
+          - --repo-root=.
+          - --gcp-zone=us-central1-a
+          - --parallelism=8
+          - --focus-regex=\[NodeConformance\]
+          - --skip-regex=\[Flaky\]|\[Slow\]|\[Serial\]
+          - '--test-args=--container-runtime-endpoint=unix:///run/containerd/containerd.sock --container-runtime-process-name=/usr/bin/containerd --container-runtime-pid-file= --kubelet-flags="--cgroup-driver=systemd --cgroups-per-qos=true --cgroup-root=/ --runtime-cgroups=/system.slice/containerd.service" --extra-log="{\"name\": \"containerd.log\", \"journalctl\": [\"-u\", \"containerd*\"]}"'
+          - --image-config-file=/home/prow/go/src/k8s.io/test-infra/jobs/e2e_node/containerd/k8s-release-branches/image-config-1.34.yaml
+          - --timeout=180m
+        env:
+          - name: GOPATH
+            value: /go
+        resources:
+          limits:
+            cpu: 4
+            memory: 6Gi
+          requests:
+            cpu: 4
+            memory: 6Gi
+  annotations:
+    testgrid-dashboards: sig-node-release-blocking
+    testgrid-tab-name: node-conformance-release-1.34
+    testgrid-alert-email: [email protected]
+    description: Node conformance tests in release branch 1.34

jobs/e2e_node/containerd/k8s-release-branches/image-config-1.34.yaml

@@ -0,0 +1,5 @@
+images:
+  cos-dev:
+    image_family: cos-121-lts
+    project: cos-cloud
+    metadata: "user-data</home/prow/go/src/k8s.io/test-infra/jobs/e2e_node/containerd/init.yaml,cni-template</home/prow/go/src/k8s.io/test-infra/jobs/e2e_node/containerd/cni.template,containerd-config</home/prow/go/src/k8s.io/test-infra/jobs/e2e_node/containerd/config-systemd.toml"