Fix: Check for duplicate input names before converting args to kwargs

- Added validation to check for duplicate input names in the function's input interface.
- Raised a ValueError if duplicate input names are detected to prevent issues during argument assignment.
- Simplified the conversion of args to kwargs by removing the redundant multiple values check.

flytekit/core/promise.py

@@ -1407,10 +1407,14 @@ def flyte_entity_call_handler(
             f"Received more arguments than expected in function '{entity.name}'. Expected {len(entity.python_interface.inputs)} but got {len(args)}"
         )
 
+    input_names = list(entity.python_interface.inputs.keys())
+
+    # check for duplicate input names
+    if len(input_names) != len(set(input_names)):
+        raise ValueError(f"Duplicate input names detected in function '{entity.name}': {input_names}")
+
     # Convert args to kwargs
     for arg, input_name in zip(args, entity.python_interface.inputs.keys()):
-        if input_name in kwargs:
-            raise AssertionError(f"Got multiple values for argument '{input_name}' in function '{entity.name}'")
         kwargs[input_name] = arg
 
     ctx = FlyteContextManager.current_context()