Add script to get etcd info (#22588)

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

tests/scripts/get_etcd_info.sh

+#!/bin/bash
+instance_name=$1
+# Define the etcdctl command with endpoints option
+etcdctl_cmd="etcdctl endpoint status -w table --endpoints"
+
+# Get the ip of all the etcd pods with the specified labels
+etcd_pods=$(kubectl get pods -l app.kubernetes.io/name=etcd,app.kubernetes.io/instance=${instance_name} -o jsonpath='{.items[*].status.podIP}')
+
+# Loop through the list of etcd pods and get their status
+endpoints=""
+for pod in $etcd_pods
+do
+    endpoints+="$pod:2379,"
+done
+
+$etcdctl_cmd ${endpoints::-1}
\ No newline at end of file