[FEA]: WarpExchange (shuffle version) where ITEMS_PER_THREAD != LOGICAL_WARP_THREADS

### Is this a duplicate?

- [x] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/cccl/issues) for this request and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)

### Area

CUB

### Is your feature request related to a problem? Please describe.

Currently, the shuffle version of WarpExchange only compiles if ITEMS_PER_THREAD == LOGICAL_WARP_THREADS. It would be desirable to have a version where there is no restriction on ITEMS_PER_THREAD (at least if ITEMS_PER_THREAD <= 32).

### Describe the solution you'd like

A version of WarpExchange that uses shuffle and allows ITEMS_PER_THREAD != LOGICAL_WARP_THREADS. If it is for ITEMS_PER_THREAD <= LOGICAL_WARP_THREADS, it would be good.

### Describe alternatives you've considered

_No response_

### Additional context

_No response_