[Sanitizers] Remove OpenBSD support (new attempt)

- Fixing VS compiler and other cases settings this time.

Reviewers: dmajor, hans

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D89759

GitOrigin-RevId: 53065c543fe3f1e7913c9e8f2487d76034afa249
6 files changed