[Story] Pass the Polars test suite without fallback

This is an aspirational issue that we will likely not achieve in its entirety. However, to the extent that it is possible, we should aim to pass the Polars test suite with the GPU engine without any fallback. To do so, the first steps are data collection:
1. Leverage #16960 to log data on all fallback cases in the Polars test suite
2. Document any additional steps required to collect these logs beyond simply using the feature
3. Open issues corresponding to each class of failure and link them as sub-issues of this one.
4. Add a page to the cudf-polars docs indicating what features are not supported by the GPU engine.

Once that is complete, for each issue we should go through and either implement the missing features or document why they cannot be implemented.