[llvm] [DAGCombiner] Inverse transform `(select c, (and X, 1), 0)` -> `(and (zext c), X)` (PR #66793)

[via llvm-commits]

goldsteinn wrote:

> Not sure whats going on with these stacked PRs - but this needs an actual patch title (and not the branch name)

Sorry, growing pains with the github workflow.

https://github.com/llvm/llvm-project/pull/66793