tests: replace busybox from docker with quay in guest pull

To prevent download failures caused by high traffic to the Docker image,
opt for quay.io/prometheus/busybox:latest over docker.io/library/busybox:latest .

Signed-off-by: ChengyuZhu6 <chengyu.zhu@intel.com>

tests/integration/kubernetes/runtimeclass_workloads/pod-file-volume.yaml

@@ -19,7 +19,7 @@ spec:
       type: File
   containers:
   - name: busybox-file-volume-container
-    image: busybox
+    image: quay.io/prometheus/busybox:latest
     volumeMounts:
     - name: shared-file
       mountPath: MOUNT_PATH

tests/integration/kubernetes/runtimeclass_workloads/pod-readonly-volume.yaml

@@ -18,7 +18,7 @@ spec:
       type: Directory
   containers:
   - name: busybox-ro-volume-container
-    image: busybox
+    image: quay.io/prometheus/busybox:latest
     volumeMounts:
     - name: shared-data
       mountPath: /tmp