[BUG] Compile warnings in tests/hash.cpp

[thirtiseven]

We have some compile warnings when building current code that need to be addressed:

warning: 'std::unique_ptr<cudf::column> cudf::hash(const cudf::table_view&, cudf::hash_id, uint32_t, rmm::cuda_stream_view, rmm::mr::device_memory_resource*)' is deprecated [-Wdeprecated-declarations]

in tests/hash.cpp.

cudf::hash was deprecated in rapidsai/cudf#15074 a few weeks ago and cudf::hashing::hash() will be removed in a follow-on release.

[mattahrens]

Duplicate of NVIDIA/spark-rapids#10487