Support "dataframe.query-planning" config in ``dask.dataframe``

[rjzamora]

This is the Dask CUDA component of rapidsai/cudf#15027

The "legacy" dask.dataframe API is now deprecated, and both dask-cudf and dask-cuda need to be updated accordingly.

• Add dask-expr support to explicit-comms
• Revert Skip explicit-comms tests when dask-expr is active #1322