Strip out hermetic llvm from the rocm toolchain. Use specific target for rocm gpu#251

alekstheod wants to merge 2 commits into

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

alekstheod:introduce_hipcc_compiler_options_env_variable_for_rocmalekstheod/rules_ml_toolchain:introduce_hipcc_compiler_options_env_variable_for_rocmCopy head branch name to clipboard