wip - Add support for univariate lists

Signed-off-by: Eduardo Apolinario <eapolinario@users.noreply.github.com>

flytekit/core/type_engine.py

@@ -803,7 +803,9 @@ def get_literal_type(self, t: Type[T]) -> Optional[LiteralType]:
     def to_literal(self, ctx: FlyteContext, python_val: T, python_type: Type[T], expected: LiteralType) -> Literal:
         t = self.get_sub_type(python_type)
         lit_list = [TypeEngine.to_literal(ctx, x, t, expected.collection_type) for x in python_val]  # type: ignore
-        return Literal(collection=LiteralCollection(literals=lit_list))
+        hash = "|".join([literal.hash for literal in lit_list if literal.hash])
+        print(f"hash={hash}")
+        return Literal(collection=LiteralCollection(literals=lit_list), hash=hash if hash != "|" else None)
 
     def to_python_value(self, ctx: FlyteContext, lv: Literal, expected_python_type: Type[T]) -> typing.List[T]:
         st = self.get_sub_type(expected_python_type)