cuproj: depend on librmm, not rmm (#1448)

Contributes to rapidsai/build-planning#33

`cuproj` does not need the `rmm` Python package... it only needs the RMM headers at build time. This proposes the following changes for `cuproj`:

* dropping the runtime requirement on `rmm` in wheels and conda packages
* switching the build requirement from `rmm` to `librmm` for wheels and conda packages
* removing unnecessary imports in the `test:` environment for conda packages

For more context on these changes, see rapidsai/build-planning#92.

## Notes for Reviewers

### Benefits of these changes

Faster conda builds (via dropping unnecessary dependencies).

Cheaper (in terms of bandwidth and disk space) installation of wheels and conda packages (via removing an unnecessary runtime dependency).

Reduces a source of network calls (and therefore CI instability) by removing some CPM downloads of RMM.

Before:

```text
-- CPM: Adding package [email protected] (branch-24.10)
```

([build link](https://github.com/rapidsai/cuspatial/actions/runs/10618529204/job/29434041322#step:9:16754))

After (this PR):

```text
  -- CPM: Using local package [email protected]
```

([build link](https://github.com/rapidsai/cuspatial/actions/runs/10619138604/job/29436119470?pr=1448#step:9:11256))

### Is this required for `libcuspatial` wheel packaging?

No, it's just a side thing I noticed while working on that. The two are totally independent.

#

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

Approvers:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)

URL: #1448

conda/recipes/cuproj/meta.yaml

@@ -62,7 +62,7 @@ requirements:
     - cython >=3.0.0
     - python
     - rapids-build-backend >=0.3.0,<0.4.0.dev0
-    - rmm ={{ minor_version }}
+    - librmm ={{ minor_version }}
     - scikit-build-core >=0.10.0
     - proj
     - sqlite
@@ -74,17 +74,11 @@ requirements:
     {% endif %}
     - {{ pin_compatible('cuda-version', max_pin='x', min_pin='x') }}
     - python
-    - rmm ={{ minor_version }}
     - cupy>=12.0.0
 
 test:            # [linux64]
   imports:       # [linux64]
     - cuproj     # [linux64]
-  requires:
-    - cupy>=12.0.0
-    - cuspatial ={{ minor_version }}
-    - rmm ={{ minor_version }}
-
 
 about:
   home: https://rapids.ai/

dependencies.yaml

@@ -113,17 +113,16 @@ files:
       table: tool.rapids-build-backend
       key: requires
     includes:
-      - depends_on_rmm
       - build_cpp_cuproj
       - build_python
       - build_wheels
+      - depends_on_librmm
   py_run_cuproj:
     output: [pyproject]
     pyproject_dir: python/cuproj
     extras:
       table: project
     includes:
-      - depends_on_rmm
       - depends_on_cupy
   py_test_cuproj:
     output: [pyproject]
@@ -193,7 +192,6 @@ dependencies:
         packages:
           - c-compiler
           - cxx-compiler
-          - &librmm_unsuffixed librmm==24.10.*,>=0.0.0a0
           - proj
           - sqlite
     specific:
@@ -556,7 +554,7 @@ dependencies:
     common:
       - output_types: conda
         packages:
-          - *librmm_unsuffixed
+          - &librmm_unsuffixed librmm==24.10.*,>=0.0.0a0
       - output_types: requirements
         packages:
           # pip recognizes the index as a global option for the requirements.txt file

python/cuproj/pyproject.toml

@@ -29,7 +29,6 @@ license = { text = "Apache 2.0" }
 requires-python = ">=3.10"
 dependencies = [
     "cupy-cuda11x>=12.0.0",
-    "rmm==24.10.*,>=0.0.0a0",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit ../../dependencies.yaml and run `rapids-dependency-file-generator`.
 classifiers = [
     "Intended Audience :: Developers",
@@ -122,7 +121,7 @@ matrix-entry = "cuda_suffixed=true"
 requires = [
     "cmake>=3.26.4,!=3.30.0",
     "cython>=3.0.0",
+    "librmm==24.10.*,>=0.0.0a0",
     "ninja",
-    "rmm==24.10.*,>=0.0.0a0",
     "wheel",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit ../../dependencies.yaml and run `rapids-dependency-file-generator`.