[compiler-rt] [compiler-rt][rtsan] Introduce first end to end RTsan lit tests, enable instrumented unit tests (PR #105732)

[Chris Apple via llvm-commits]

cjappl wrote:

If you are in need of debugging very quickly, I am happy to talk on discord (@apple412) or email (in the commit messages), just shout if I can be of assistance.

https://github.com/llvm/llvm-project/pull/105732