This patch switches us to using LLVM_ENABLE_RUNTIMES rather than using separate runtimes builds for some reductions in CMake configuration time and some simplification of the monolithic-linux.sh script. Reviewers: DavidSpickett, cmtice, lnihlen, Endilll, tstellar Reviewed By: Endilll, DavidSpickett Pull Request: https://github.com/llvm/llvm-project/pull/142694