[llvm] [SelectionDAG] Add space-optimized forms of OPC_CheckPredicate (PR #73488)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@wangpc-pp  This is on an expensive checks build (cmake -DLLVM_ENABLE_EXPENSIVE_CHECKS=true) - these builds do extra stable sorting which can sometimes cause check diffs

https://github.com/llvm/llvm-project/pull/73488