Raise an error on import for unsupported GPUs. (#15053)

RAPIDS 24.02 dropped support for Pascal GPUs. When using an unsupported GPU, the behavior of cudf is undefined and sometimes produces results that appear valid (and empty) but conceal CUDA kernel launch errors. This PR changes the behavior to error on import if unsupported GPUs are detected.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - Matthew Roeschke (https://github.com/mroeschke)

URL: #15053

python/cudf/cudf/utils/gpu_utils.py

@@ -86,7 +86,7 @@ def validate_setup():
             minor_version = getDeviceAttribute(
                 cudaDeviceAttr.cudaDevAttrComputeCapabilityMinor, 0
             )
-            warnings.warn(
+            raise UnsupportedCUDAError(
                 "A GPU with NVIDIA Volta™ (Compute Capability 7.0) "
                 "or newer architecture is required.\n"
                 f"Detected GPU 0: {device_name}\n"