[compiler-rt] Revert "[scudo] Use getMonotonicTimeFast for tryLock." (PR #86590)

[Christopher Ferris via llvm-commits]

https://github.com/cferris1000 approved this pull request.

We could also continue to use this function if we did a right shift to get better resolution.

However, I'm not sure that using a random seed here make a lot of sense. It almost might be better to just use a round-robin especially when there are only two TSDs.

But that requires more experimentation.

https://github.com/llvm/llvm-project/pull/86590