[llvm] [llvm] Disable HandleLLVMOptions in runtimes mode (PR #73031)

[via llvm-commits]

EricWF wrote:

I've also bisected issues with sanitizer builds back to this commit. 

* https://github.com/llvm/llvm-project/actions/runs/7014942157/job/19085214160

This is likely because part of the handling of LLVM_USE_SANITIZER happens in HandleLLVMOptions.

https://github.com/llvm/llvm-project/pull/73031