[SystemZ][z/OS] Add new openFileForReadBinary function, and pass IsText parameter to getBufferForFile#111723

abhina-sree merged 3 commits intollvm:mainllvm/llvm-project:mainfrom

abhina-sree:abhina/distinguish_text_binary_open_fileabhina-sree/llvm-project:abhina/distinguish_text_binary_open_fileCopy head branch name to clipboard