[skip e2e]add script to get chart version by app version (#24954)

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

tests/scripts/get_helm_chart_version_by_app_version.py

+import subprocess
+import json
+def get_chart_version(repo = "milvus/milvus", app_version="2.2.0"):
+    """
+    Get helm chart version by app version
+    """
+    cmd = f"helm search repo {repo} -l -o json"
+    result = subprocess.check_output(cmd, shell=True)
+    result = json.loads(result)
+    all_chart_versions = []
+    for item in result:
+        if item["app_version"] == app_version:
+            all_chart_versions.append(item["version"])
+    if len(all_chart_versions) == 0:
+        raise Exception(f"Cannot find helm chart version for app version {app_version}")
+    all_chart_versions.sort()
+    result = all_chart_versions[-1]
+    return result
+
+if __name__ == "__main__":
+    import argparse
+    parser = argparse.ArgumentParser(description="Get helm charts version by app version")
+    parser.add_argument("--app-version", type=str, default="2.2.0", help="app version")
+    parser.add_argument("--repo", type=str, default="milvus/milvus", help="helm repo")
+    args = parser.parse_args()
+    repo = args.repo
+    app_version = args.app_version
+    chart_version = get_chart_version(repo=repo, app_version=app_version)
+    print(chart_version)
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