Fix @task.kubernetes_cmd TaskGroup.expand mappings by templating TaskFlow args

providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/decorators/kubernetes_cmd.py

@@ -36,7 +36,8 @@
 class _KubernetesCmdDecoratedOperator(DecoratedOperator, KubernetesPodOperator):
     custom_operator_name = "@task.kubernetes_cmd"
 
-    template_fields: Sequence[str] = KubernetesPodOperator.template_fields
+    template_fields: Sequence[str] = tuple({"op_args", "op_kwargs", *KubernetesPodOperator.template_fields})
+
     overwrite_rtif_after_execution: bool = True
 
     def __init__(self, *, python_callable: Callable, args_only: bool = False, **kwargs) -> None:
@@ -69,6 +70,8 @@ def __init__(self, *, python_callable: Callable, args_only: bool = False, **kwar
         )
 
     def execute(self, context: Context):
+        self.render_template_fields(context)
+
         generated = self._generate_cmds(context)
         if self.args_only:
             self.cmds = []

providers/cncf/kubernetes/tests/unit/cncf/kubernetes/decorators/test_kubernetes_cmd.py

@@ -397,3 +397,26 @@ def hello():
             self.execute_task(hello_task)
         self.mock_hook.assert_not_called()
         self.mock_create_pod.assert_not_called()
+
+    def test_kubernetes_cmd_template_fields_include_taskflow_args(self):
+        """Test that kubernetes_cmd operator has op_args and op_kwargs in template_fields"""
+        with self.dag_maker:
+
+            @task.kubernetes_cmd(
+                image="python:3.10-slim-buster",
+                in_cluster=False,
+                cluster_context="default",
+                config_file="/tmp/fake_file",
+                namespace="default",
+            )
+            def hello(name: str) -> list[str]:
+                return ["echo", name]
+
+            hello_task = hello("world")
+
+        op = hello_task.operator
+
+        assert "op_args" in op.template_fields
+        assert "op_kwargs" in op.template_fields
+        assert "cmds" in op.template_fields
+        assert "arguments" in op.template_fields