[skip e2e]Add script to get ectd status (#22638)

Signed-off-by: zhuwenxing <wenxing.zhu@zilliz.com>

tests/scripts/get_etcd_info.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e # Exit immediately if a command exits with a non-zero status.
 instance_name=$1
 # Define the etcdctl command with endpoints option
 etcdctl_cmd="etcdctl endpoint status -w table --endpoints"
@@ -6,6 +7,12 @@ etcdctl_cmd="etcdctl endpoint status -w table --endpoints"
 # Get the ip of all the etcd pods with the specified labels
 etcd_pods=$(kubectl get pods -l app.kubernetes.io/name=etcd,app.kubernetes.io/instance=${instance_name} -o jsonpath='{.items[*].status.podIP}')
 
+# Check if the etcd pods are running
+if [ -z "$etcd_pods" ]; then
+    echo "No etcd pods found"
+    exit 1
+fi
+
 # Loop through the list of etcd pods and get their status
 endpoints=""
 for pod in $etcd_pods