fix code report issues (Azure#37657)

Co-authored-by: Catalina Peralta <caperal@microsoft.com>

scripts/breaking_changes_checker/detect_breaking_changes.py

@@ -260,6 +260,8 @@ def get_parameter_type(annotation) -> str:
     if isinstance(annotation, ast.Attribute):
         return annotation.attr
     if isinstance(annotation, ast.Constant):
+        if annotation.value is None:
+            return "None"
         return annotation.value
     if isinstance(annotation, ast.Subscript):
         if isinstance(annotation.slice, tuple):
@@ -396,6 +398,7 @@ def create_class_report(cls: Type) -> Dict:
             m = getattr(cls, method)
         except AttributeError:
             _LOGGER.info(f"Skipping method check for {method} on {cls}.")
+            continue
 
         if inspect.isfunction(m) or inspect.ismethod(m):
             if inspect.iscoroutinefunction(m):