[BUG]: single pass reduce

### Is this a duplicate?

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

### Type of Bug

Performance

### Component

CUB

### Describe the bug

Make reduce single pass instead of 2 pass, required to improve the performance of reduce by 10x for sizes < 1GB.

Internal implementation available.

### How to Reproduce

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### Expected behavior

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### Reproduction link

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### Operating System

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### nvidia-smi output

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### NVCC version

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