[CodeGen][NewPM] Port RegisterCoalescer to NPM#124698

arsenm merged 5 commits intomainllvm/llvm-project:mainfrom

users/Akshat-Oke/01-28-_codegen_newpm_port_registercoalescer_to_npmllvm/llvm-project:users/Akshat-Oke/01-28-_codegen_newpm_port_registercoalescer_to_npmCopy head branch name to clipboard