nvidia-cudnn for cuda 11.8

[M. Zhou]

I submitted a pre-approval request to the release team. Let's see how they think.
This package is indeed a very leaf package. It's only reverse dependency is
pytorch-cuda, which has not yet landed onto experimental (still in NEW queue).

On Thu, 2023-04-27 at 21:12 +0200, Andreas Beckmann wrote:
> On 27/04/2023 21.01, M. Zhou wrote:
> > I thought about that but do we have enough time to make it migrate?
> > I added some significant difference in the postinst script compared to the current version in testing.
> > I don't know whether the release manager will let it pass.
> 
> Well, you can at least try. The package is in non-free and a leaf 
> package (unless I'm mistaken) and therefore changing it should have no 
> impact on any other package in the archive.
> 
> Andreas