[clang] [Clang] Overflow Pattern Exclusions (PR #100272)

[Kees Cook via cfe-commits]

kees wrote:

> Before reland, please include me into review I'd like to understand why `-fsanitize-pattern-exclusion=all` is better than something like `-fno-sanitize=overflow-pattern-all`

The latter doesn't make sense to me. `no-sanitize` takes a list of sanitizers to completely disable. The pattern exclusion option is also listing sanitizers for altering their behavior. I find the option naming in the existing patch intuitive.

https://github.com/llvm/llvm-project/pull/100272