[ROCm] support hermetic sysroot and clean up hipcc wrapper#262

yuriivcs merged 8 commits into

google-ml-infra:maingoogle-ml-infra/rules_ml_toolchain:mainfrom

alekstheod:rocm_clean_up_hipcc_wrapperalekstheod/rules_ml_toolchain:rocm_clean_up_hipcc_wrapperCopy head branch name to clipboard