Add MultiQueryNodes tag for resource group (#22527)

Signed-off-by: yanliang567 <yanliang.qiao@zilliz.com>

tests/python_client/common/common_func.py

@@ -56,7 +56,9 @@ def gen_unique_str(str_value=None):
     return "test_" + prefix if str_value is None else str_value + "_" + prefix
 
 
-def gen_str_by_length(length=8):
+def gen_str_by_length(length=8, letters_only=False):
+    if letters_only:
+        return "".join(random.choice(string.ascii_letters) for _ in range(length))
     return "".join(random.choice(string.ascii_letters + string.digits) for _ in range(length))
 
 

tests/python_client/common/common_type.py

@@ -256,3 +256,4 @@ class CaseLabel:
     L3 = "L3"
     Loadbalance = "Loadbalance"  # loadbalance testcases which need to be run in multi query nodes
     ClusterOnly = "ClusterOnly"  # For functions only suitable to cluster mode
+    MultiQueryNodes = "MultiQueryNodes"  # for 8 query nodes configs tests, such as resource group