[compiler-rt] [sanitizers] COMPILER_RT_ASAN_UNIT_TESTS_USE_HOST_RUNTIME to build only unit tests (PR #161455)

[Mariusz Borsa via llvm-commits]

wrotki wrote:

Merged on behalf of @ndrewh who has his Commit Access Request pending still.

https://github.com/llvm/llvm-project/pull/161455