Load Skala 1.1 rev1 artifacts by default

[tvogels]

Use new skala-1.1-rev1 checkpoints.

Instead of the previous approach where we allow multiple hashes (old and new) for the same skala-1.1 functional, the files are now stored with a -rev1 suffix.

Resolving now works like

_SKALA_VERSIONS = {
    "skala-1.0": ("skala-1.0.fun", "skala-1.0-cuda.fun"),
    "skala-1.1": ("skala-1.1-rev1.fun", "skala-1.1-rev1-cuda.fun"),
    "skala-1.1-rev0": ("skala-1.1.fun", "skala-1.1-cuda.fun"),
    "skala-1.1-rev1": ("skala-1.1-rev1.fun", "skala-1.1-rev1-cuda.fun"),
}

[JensWehner]

Thanks for the clean-up.