[llvm] [VectorCombine] Fold Deinterleave/Interleave Pairs (PR #211022)

[Jacob Crawley via llvm-commits]

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jacob-crawley wrote:

I agree, I think this is my preferred approach too since the class can't be reused.

I reverted back to the original implementation of including everything within `foldDeinterleaveInterleavePair`.

https://github.com/llvm/llvm-project/pull/211022