[GPU] Activate AdvectionDiffusion Refinement

With !356 (merged) the ad scaling was removed. However, with this commit, the ad was already extracted into its own files: https://git.rz.tu-bs.de/irmb/VirtualFluids_dev/-/merge_requests/356/diffs?commit_id=6984d38a96919f5c61be797dfc6eeb44a96b75ad

We want to put AD Scaling into the code again, together with an application and a regression test.