Additional tests for cudf::distinct using the new row hasher

#10641 adds new a new row hasher capable of natively handling nested struct and list types. The new hasher was tested by incorporating it into the implementation of `cudf::distinct`. Now that the functionality for `cudf::distinct` has been expanded by the use of this new hasher, we should add tests for some new cases, as was pointed out in some discussion threads on that PR:
- [X] We should add tests of tests with sliced input for both structs and lists input columns (https://github.com/rapidsai/cudf/pull/10641#discussion_r858037209)
- [X] We should add tests for simple nested cases like `List>` and `Struct>` to ensure that the new nesting behavior really works as expected (https://github.com/rapidsai/cudf/pull/10641#discussion_r853494994)
- [ ] We should add at least one test of a more complex nested case (e.g. `List>>>`) to potentially help catch unexpected errors (https://github.com/rapidsai/cudf/pull/10641#discussion_r853494994)

Adding these tests will be helpful to validate the behavior of the new row hasher.