Make the NVIDIA prebuilt selection version-dynamic and driver-gated on both the
Windows (ggml-org) and Linux (unslothai/llama.cpp) paths, so CUDA version bumps
are handled with no code change while staying safe across driver versions.
- Derive candidate CUDA runtime lines from the driver major; pick the highest
upstream-published minor the driver can actually run, so a sub-13.3 driver is
never handed an unguaranteed 13.3 build.
- Pin b9360's cuda-13.1 build (immutable, hash-verified) as a GPU fallback for a
Blackwell host on a 13.1/13.2 driver that the in-release 13.3 build gates off,
on both the simple and published install paths. Dormant for every other host
and self-disabling once upstream ships a driver-runnable build again.
- Seed the published-path ordering from the release's real published minors so a
future CUDA major is selectable with no code change.
Refs #5861, #5817, #5807, #5858, #5854, #5826, #5887.
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