rearrange dependencies.yaml, fix development instructions (#1451)

Follow-up to #1448. This proposes some `dependencies.yaml` changes that I noticed while working on adding `libcuspatial` wheels in #1450.

I've left inline comments with more details, but in short:

* not including any cuspatial projects in the conda environment files checked into this repo (which are intended to be used to set up a development environment)
* removing an unnecessary conda-only list of dependencies from pyproject.toml-specific config for `cuproj`
* introduction of `depends_on_libcuspatial` and `depends_on_cuproj` lists in `dependencies.yaml`, to reduce duplication

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

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

URL: #1451

conda/environments/all_cuda-118_arch-x86_64.yaml

@@ -24,8 +24,6 @@ dependencies:
 - ipython
 - ipywidgets
 - libcudf==24.10.*,>=0.0.0a0
-- libcuspatial-tests==24.10.*,>=0.0.0a0
-- libcuspatial==24.10.*,>=0.0.0a0
 - librmm==24.10.*,>=0.0.0a0
 - myst-parser
 - nbsphinx

conda/environments/all_cuda-125_arch-x86_64.yaml

@@ -27,8 +27,6 @@ dependencies:
 - ipython
 - ipywidgets
 - libcudf==24.10.*,>=0.0.0a0
-- libcuspatial-tests==24.10.*,>=0.0.0a0
-- libcuspatial==24.10.*,>=0.0.0a0
 - librmm==24.10.*,>=0.0.0a0
 - myst-parser
 - nbsphinx

dependencies.yaml

@@ -18,11 +18,9 @@ files:
       - depends_on_cuml
       - depends_on_cupy
       - depends_on_libcudf
-      - depends_on_libcuspatial
       - depends_on_librmm
       - rapids_build_skbuild
       - run_python_cuspatial
-      - test_libcuspatial
       - test_notebooks
       - test_python_cuspatial
       - test_python_cuproj
@@ -37,21 +35,21 @@ files:
     output: none
     includes:
       - cuda_version
-      - depends_on_libcuspatial
+      - depends_on_cuproj
+      - depends_on_cuspatial
       - py_version
       - test_python_cuspatial
       - test_python_cuproj
-      - test_cuspatial
   test_notebooks:
     output: none
     includes:
       - cuda_version
       - depends_on_cuml
-      - depends_on_libcuspatial
+      - depends_on_cuproj
+      - depends_on_cuspatial
       - test_notebooks
       - notebooks
       - py_version
-      - test_cuspatial
   checks:
     output: none
     includes:
@@ -61,10 +59,10 @@ files:
     output: none
     includes:
       - cuda_version
-      - depends_on_libcuspatial
+      - depends_on_cuspatial
+      - depends_on_cuproj
       - docs
       - py_version
-      - test_cuspatial
   py_build_libcuspatial:
     output: [pyproject]
     pyproject_dir: python/libcuspatial
@@ -165,7 +163,6 @@ files:
     includes:
       - test_python_cuproj
       - depends_on_cuspatial
-      - test_cuspatial
 
 channels:
   - rapidsai
@@ -551,6 +548,31 @@ dependencies:
               - cuspatial-cu11==24.10.*,>=0.0.0a0
           - {matrix: null, packages: [*cuspatial_unsuffixed]}
 
+  depends_on_cuproj:
+    common:
+      - output_types: conda
+        packages:
+          - &cuproj_unsuffixed cuproj==24.10.*,>=0.0.0a0
+      - output_types: requirements
+        packages:
+          # pip recognizes the index as a global option for the requirements.txt file
+          - --extra-index-url=https://pypi.nvidia.com
+          - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
+    specific:
+      - output_types: [requirements, pyproject]
+        matrices:
+          - matrix:
+              cuda: "12.*"
+              cuda_suffixed: "true"
+            packages:
+              - cuproj-cu12==24.10.*,>=0.0.0a0
+          - matrix:
+              cuda: "11.*"
+              cuda_suffixed: "true"
+            packages:
+              - cuproj-cu11==24.10.*,>=0.0.0a0
+          - {matrix: null, packages: [*cuproj_unsuffixed]}
+
   depends_on_cupy:
     common:
       - output_types: conda
@@ -573,13 +595,6 @@ dependencies:
       - output_types: conda
         packages:
           - libcuspatial-tests==24.10.*,>=0.0.0a0
-  test_cuspatial:
-    common:
-      - output_types: conda
-        packages:
-          - cuspatial==24.10.*,>=0.0.0a0
-          - cuproj==24.10.*,>=0.0.0a0
-
   depends_on_libcuspatial:
     common:
       - output_types: conda