[clang] [WIP] [clang][CodeGen] Fix metadata when vectorization is disabled by pragma (PR #135163)

[Ryotaro Kasuga via cfe-commits]

================
@@ -5237,8 +5237,8 @@ width/count of the set of target architectures supported by your application.
     ...
   }
 
-Specifying a width/count of 1 disables the optimization, and is equivalent to
-``vectorize(disable)`` or ``interleave(disable)``.
----------------
kasuga-fj wrote:

Correct. The previous my comment were written before noticing the fact that `vectorize(disable) vectorize_width(scalable)` is being rejected. Sorry for confusion, I also don't think that there are any ambiguities.

https://github.com/llvm/llvm-project/pull/135163