[llvm] [TargetLowering] Fold (a | b) ==/!= b -> (a & ~b) == /!= 0 when and-not exists (PR #145368)

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AZero13 wrote:

Note that there is also a comment in this file from a developer lamenting how m_Or would have been useful. This also implies they found m_Or could not be used, so this problem has come up in Target Lowering.

https://github.com/llvm/llvm-project/pull/145368