[clang] [CodeGen] -fsanitize=alignment: add cl::opt sanitize-alignment-builtin to disable memcpy instrumentation (PR #69240)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

For reference, can you give a couple examples of code where this is triggering?

If this is triggering in practice, do we want a real driver option to control the sanitizer?  The alignment attributes themselves?

https://github.com/llvm/llvm-project/pull/69240