[llvm] [DAG]: Created method `m_SelectLike` to match `ISD::Select` and `ISD::VSelect` (PR #164069)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon requested changes to this pull request.

There should be a few places in DAGCombiner that can be converted to use this - foldSelectWithIdentityConstant / tryToFoldExtendSelectLoad / takeInexpensiveLog2

https://github.com/llvm/llvm-project/pull/164069