Update code_report.py (Azure#39106)

* Update code_report.py

* Fix AttributeError by using `__all__` for operations

Author: ChenxiJiang333

tools/azure-sdk-tools/packaging_tools/code_report.py

@@ -57,7 +57,7 @@ def create_report(module_name: str) -> Dict[str, Any]:
         report["client"] = []
 
     # Look for models first
-    model_names = [model_name for model_name in dir(module_to_generate.models) if model_name[0].isupper()]
+    model_names = [model_name for model_name in module_to_generate.models.__all__ if model_name[0].isupper()]
     is_new_model = hasattr(module_to_generate, "_model_base")
     for model_name in model_names:
         model_cls = getattr(module_to_generate.models, model_name)
@@ -69,7 +69,7 @@ def create_report(module_name: str) -> Dict[str, Any]:
             report["models"]["enums"][model_name] = create_model_report(model_cls, is_new_model)
     # Look for operation groups
     try:
-        operations_classes = [op_name for op_name in dir(module_to_generate.operations) if op_name[0].isupper()]
+        operations_classes = [op_name for op_name in module_to_generate.operations.__all__ if op_name[0].isupper()]
     except AttributeError:
         # This guy has no "operations", this is possible (Cognitive Services). Just skip it then.
         operations_classes = []