[llvm] [DAGCombiner, NVPTX] Port 'rem' custom combine from NVPTX to generic combiner (PR #167147)

[via llvm-commits]

VindhyaP312 wrote:

@RKSimon due to some inevitable commitments, we are unable to work on this right now. We will resume working on it from December. Sincere apologies for the delay.

https://github.com/llvm/llvm-project/pull/167147