[mlir][dataflow] Use skipRegions to print region op (NFC)#161066

linuxlonelyeagle merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

linuxlonelyeagle:use-skip-regions-in-liveness-analysislinuxlonelyeagle/llvm-project:use-skip-regions-in-liveness-analysisCopy head branch name to clipboard