[compiler-rt] [sanitizer_common][tsan] Improve message for unsupported vm config on Apple platforms (PR #158665)

[Dan Blackwell via llvm-commits]

https://github.com/DanBlackwell approved this pull request.

Let me know what your thoughts are with respect to printf vs report for the fatal paths. Happy to merge this for you afterwards; this is a useful contribution!

https://github.com/llvm/llvm-project/pull/158665