use rapids-generate-pip-constraints to pin to oldest dependencies in …

…CI (#1716)

Follow-up to #1613

Similar to rapidsai/cudf#17131

Proposes using the new `rapids-generate-pip-constraints` tool from `gha-tools` to generate a list of pip constraints pinning to the oldest supported verisons of dependencies here.

## Notes for Reviewers

### How I tested this

`wheel-tests`:

* oldest-deps: numpy 1.x ([build link](https://github.com/rapidsai/rmm/actions/runs/11620907528/job/32364032641?pr=1716#step:8:106))
* latest-deps: numpy 2.x ([build link](https://github.com/rapidsai/rmm/actions/runs/11620907528/job/32364032835?pr=1716#step:8:104))

And the testing of the general approach in rapidsai/gha-tools#114 (comment)

Authors:
  - James Lamb (https://github.com/jameslamb)

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

URL: #1716

ci/test_wheel.sh

@@ -7,15 +7,8 @@ RAPIDS_PY_CUDA_SUFFIX="$(rapids-wheel-ctk-name-gen ${RAPIDS_CUDA_VERSION})"
 WHEELHOUSE="${PWD}/dist/"
 RAPIDS_PY_WHEEL_NAME="rmm_${RAPIDS_PY_CUDA_SUFFIX}" rapids-download-wheels-from-s3 python "${WHEELHOUSE}"
 
-# Constraint to minimum dependency versions if job is set up as "oldest"
-echo "" > ./constraints.txt
-if [[ $RAPIDS_DEPENDENCIES == "oldest" ]]; then
-  rapids-dependency-file-generator \
-        --output requirements \
-        --file-key test_python \
-        --matrix "cuda=${RAPIDS_CUDA_VERSION%.*};arch=$(arch);py=${RAPIDS_PY_VERSION};dependencies=${RAPIDS_DEPENDENCIES}" \
-      | tee ./constraints.txt
-fi
+# generate constraints (possibly pinning to oldest support versions of dependencies)
+rapids-generate-pip-constraints test_python ./constraints.txt
 
 # echo to expand wildcard before adding '[extra]' requires for pip
 python -m pip install \