[clang] [CIR] max-across-vector (vmaxv_*) intrinsics (PR #194401)

[Kartik Ohlan via cfe-commits]

Ko496-glitch wrote:

> > @banach-space i ran into issues when changing the
> > ```
> > // LLVM-LABEL: @test_vmaxv_s8(
> > // CIR-LABEL: @test_vmaxv_s8(
> > ```
> > 
> > 
> >     
> >       
> >     
> > 
> >       
> >     
> > 
> >     
> >   
> > to `ALL-LABEL: @test_vmaxv_s8`
> 
> Please be more specific - what issues?

Nvm i changed the Labels to follow the original practise i.e 
```
// LLVM-LABEL: @test_vmaxv_s8(
// CIR-LABEL: @vmaxv_s8(
```
please let me know if this looks good, 

Also regarding the vmax_f16 variant where do you suggest to place the implementation since its different it will be place out of the case statement no ? 

https://github.com/llvm/llvm-project/pull/194401