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

[Benjamin Maxwell via llvm-commits]

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MacDue wrote:

nit: arg_size() must equal Factor (outside of invalid IR)
```suggestion
      if (II->hasOperandBundles())
```

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