Add tuple support to set Struct

fixes #13205

PiperOrigin-RevId: 547465304

Author: anandolee

python/google/protobuf/internal/well_known_types.py

@@ -446,7 +446,7 @@ def _SetStructValue(struct_value, value):
   elif isinstance(value, (dict, Struct)):
     struct_value.struct_value.Clear()
     struct_value.struct_value.update(value)
-  elif isinstance(value, (list, ListValue)):
+  elif isinstance(value, (list, tuple, ListValue)):
     struct_value.list_value.Clear()
     struct_value.list_value.extend(value)
   else:

python/google/protobuf/internal/well_known_types_test.py

@@ -528,7 +528,8 @@ def testMergeFrom(self):
         'key5': [6, 'seven', True, False, None, {'subkey2': 9}],
         'key6': [['nested_list', True]],
         'empty_struct': {},
-        'empty_list': []
+        'empty_list': [],
+        'tuple': ((3,2), ())
     }
     struct.update(dictionary)
     self.assertEqual(5, struct['key1'])