[clang] [flang] [flang] Add -f[no-]vectorize flags (PR #119718)

[David Truby via cfe-commits]

DavidTruby wrote:

I have force pushed this to my branch but github doesn't seem to be picking it up on this review?? I don't really know how to fix this.

https://github.com/llvm/llvm-project/pull/119718