[compiler-rt] Synchronizing ASAN init on Windows (PR #71833)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka requested changes to this pull request.

We like small commits here. Unfortunately github is not very suitable, or LLVM didn't figured our what is going to be a flow.

Still I will ask you extract into NFC patches:
1. NFC: All clang-format changes
2. NFC: Introduction of setters/getter, as-is without atomics
3. Real patch with windows synchronization

https://github.com/llvm/llvm-project/pull/71833