[clang] Add test run of 'dump_ast_matchers.py'#165472

vbvictor wants to merge 14 commits intollvm:mainllvm/llvm-project:mainfrom

vbvictor:acp/vbvictor/7336963445133113vbvictor/llvm-project:acp/vbvictor/7336963445133113Copy head branch name to clipboard