[compiler-rt] Convert Maintainers.txt into Maintainers.md#119169

vitalybuka merged 7 commits intomainllvm/llvm-project:mainfrom

users/vitalybuka/spr/compiler-rt-convert-maintainerstxt-into-maintainersmdllvm/llvm-project:users/vitalybuka/spr/compiler-rt-convert-maintainerstxt-into-maintainersmdCopy head branch name to clipboard