stop uploading packages to downloads.rapids.ai (#215)

Contributes to rapidsai/build-planning#181

Proposes stopping all uploads of wheels and conda packages to `downloads.rapids.ai`, in favor of using the GitHub Actions artifact store.

## Notes for Reviewers

### Intentionally targeting `branch-25.08`

To avoid disrupting the 25.06 release.

### How I found the lines to change

```shell
git grep -E '\-s3'
git grep 'upload'
git grep -E 'downloads\.rapids'
```

### Why `cugraph-gnn`?

See "Deployment Plan" on rapidsai/shared-workflows#364

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

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

URL: #215

Author: jameslamb

.github/workflows/build.yaml

@@ -60,7 +60,7 @@ jobs:
   upload-conda:
     needs: [cpp-build, python-build]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@gha-artifacts/uploads
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -83,7 +83,7 @@ jobs:
   wheel-publish-cugraph-pyg:
     needs: wheel-build-cugraph-pyg
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@gha-artifacts/uploads
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -119,7 +119,7 @@ jobs:
   wheel-publish-libwholegraph:
     needs: wheel-build-libwholegraph
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.06
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@gha-artifacts/uploads
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -130,7 +130,7 @@ jobs:
   wheel-publish-pylibwholegraph:
     needs: wheel-build-pylibwholegraph
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@gha-artifacts/uploads
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}

ci/build_cpp.sh

@@ -29,5 +29,3 @@ rattler-build build --recipe conda/recipes/libwholegraph \
                     "${RATTLER_CHANNELS[@]}"
 
 sccache --show-adv-stats
-
-rapids-upload-conda-to-s3 cpp

ci/build_python.sh

@@ -57,5 +57,3 @@ sccache --zero-stats
 # remove build_cache directory to avoid uploading the entire source tree
 # tracked in https://github.com/prefix-dev/rattler-build/issues/1424
 rm -rf "$RAPIDS_CONDA_BLD_OUTPUT_DIR"/build_cache
-
-rapids-upload-conda-to-s3 python

ci/build_wheel.sh

@@ -48,14 +48,11 @@ sccache --show-adv-stats
 
 # pure-python packages should be marked as pure, and not have auditwheel run on them.
 if [[ ${package_name} == "cugraph-pyg" ]]; then
-    RAPIDS_PY_WHEEL_NAME="${package_name}_${RAPIDS_PY_CUDA_SUFFIX}" RAPIDS_PY_WHEEL_PURE="1" rapids-upload-wheels-to-s3 python dist
     cp dist/* "${RAPIDS_WHEEL_BLD_OUTPUT_DIR}/"
 else
     # repair wheels and write to the location that artifact-uploading code expects to find them
     python -m auditwheel repair \
         "${EXCLUDE_ARGS[@]}" \
         -w "${RAPIDS_WHEEL_BLD_OUTPUT_DIR}" \
         dist/*
-
-    RAPIDS_PY_WHEEL_NAME="${package_name}_${RAPIDS_PY_CUDA_SUFFIX}" rapids-upload-wheels-to-s3 "${package_type}" "${RAPIDS_WHEEL_BLD_OUTPUT_DIR}"
 fi