lpython.py: Set __name__ for overload()

src/runtime/lpython/lpython.py

@@ -128,6 +128,9 @@ def __call__(self, *args, **kwargs):
 
 def overload(f):
     overloaded_f = OverloadedFunction(f)
+    overloaded_f.__name__ = f.__name__
+    overloaded_f.__code__ = f.__code__
+    overloaded_f.__annotations__ = f.__annotations__
     return overloaded_f
 
 # To be handled in ASR