[llvm-dwp] turn duplicate dwo id into warning, continue to gen dwp#121193

Jinjie-Huang wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

Jinjie-Huang:users/huangjinjie/duplicate_dwo_warningJinjie-Huang/llvm-project:users/huangjinjie/duplicate_dwo_warningCopy head branch name to clipboard