[llvm] [X86] Move the AVX512 VSELECT(COND, 0, X) -> VSELECT(!COND, X, 0) fold to DAGToDAG (PR #145724)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@davemgreen this should remove the need for the addition of isTargetCanonicalSelect in #145473 - please can you confirm?

https://github.com/llvm/llvm-project/pull/145724