ci: Use same conda environment for Mac/Linux/Windows

.github/workflows/conda/environment_windows.yml

-name: eigenpy
-channels:
-  - conda-forge
-dependencies:
-  - eigen
-  - cmake
-  - numpy
-  - pkg-config
-  - boost
-  - ccache
-  - cxx-compiler
-  - ninja
-  - scipy

.github/workflows/macos-linux-conda.yml

@@ -71,7 +71,7 @@ jobs:
       with:
         activate-environment: eigenpy
         auto-update-conda: true
-        environment-file: .github/workflows/conda/environment_macos_linux.yml
+        environment-file: .github/workflows/conda/environment_all.yml
         python-version: ${{ matrix.python-version }}
         auto-activate-base: false
 

.github/workflows/windows-conda.yml

@@ -53,7 +53,7 @@ jobs:
       with:
         activate-environment: eigenpy
         auto-update-conda: true
-        environment-file: .github/workflows/conda/environment_windows.yml
+        environment-file: .github/workflows/conda/environment_all.yml
         python-version: "3.10"
         auto-activate-base: false