Post RAPIDS roll out: Update default CUDA from 12.5 to 12.8 (and other bits)

[jakirkham]

CUDA 12.5 is pinned in a few places. After we have RAPIDS updated and building with CUDA 12.8, we will want to sweep back through and update these remaining bits

devcontainers/features/src/cuda/devcontainer-feature.json

Line 25 in febd04e

"default": "12.5",

devcontainers/matrix.yml

Line 5 in febd04e

x-cuda-curr-max: &cuda_curr_max_rapids { name: "cuda", version: "12.5" }

devcontainers/.github/workflows/build-all-rapids-repos.yml

Line 39 in febd04e

cuda: '["12.5"]'

devcontainers/features/test/_global/cpp_llvm_cuda_nvhpc.sh

Line 42 in febd04e

check "CUDA version" bash -c "echo '$CUDA_VERSION' | grep '12.5.0'";

devcontainers/features/test/ucx/scenarios.json

Line 6 in febd04e

"version": "12.5"

devcontainers/features/src/cuda/install.sh

Line 33 in febd04e

VERSION="${CUDA_VERSION:-${VERSION:-12.5.0}}";

devcontainers/windows/image/installers/install-cuda.ps1

Line 4 in febd04e

$cudaVersion="12.5.0"

devcontainers/features/src/cuda/README.md

Line 18 in febd04e

| version | Version of the CUDA Toolkit to install. | string | 12.5 |

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To simplify future updates, we may want to consolidate more of these to a single file with the latest CUDA version. That way fewer things will need to be touched each time