Pin cupy version in wheels CI (#13041)

cupy just released version 12, which we do not yet support, so wheels CI must be pinned to require a lower version

Authors:
   - Vyas Ramasubramani (https://github.com/vyasr)

Approvers:
   - Sevag H (https://github.com/sevagh)

.github/workflows/pr.yaml

@@ -113,7 +113,7 @@ jobs:
       build_type: pull-request
       package-name: cudf
       # Install cupy-cuda11x for arm from a special index url
-      test-before-arm64: "python -m pip install cupy-cuda11x -f https://pip.cupy.dev/aarch64"
+      test-before-arm64: "python -m pip install 'cupy-cuda11x<12.0.0' -f https://pip.cupy.dev/aarch64"
       test-unittest: "python -m pytest -v -n 8 ./python/cudf/cudf/tests"
       test-smoketest: "python ./ci/wheel_smoke_test_cudf.py"
   wheel-build-dask-cudf:

.github/workflows/test.yaml

@@ -86,7 +86,7 @@ jobs:
       date: ${{ inputs.date }}
       sha: ${{ inputs.sha }}
       package-name: cudf
-      test-before-arm64: "python -m pip install cupy-cuda11x -f https://pip.cupy.dev/aarch64"
+      test-before-arm64: "python -m pip install 'cupy-cuda11x<12.0.0' -f https://pip.cupy.dev/aarch64"
       test-unittest: "python -m pytest -v -n 8 ./python/cudf/cudf/tests"
   wheel-tests-dask-cudf:
     secrets: inherit