[clang] [CIR] Support load/store for Vector of bools (PR #212146)

[Amr Hesham via cfe-commits]

AmrDeveloper wrote:

> This looks much better, but can you add a test that access the vector? Maybe something like this:
> 
> ```
> void f(v8b vec) {
>   vec[1] = vec[3];
> }
> ```

Done

https://github.com/llvm/llvm-project/pull/212146