fix: python on windows

`install-qt-action` uses `setup-python`, which in turn influences which Python version is chosen by CMake. We need to have the packages installed only after this is done.

Author: raphaelcoeffic

.github/workflows/win_cpn-64.yml

@@ -51,24 +51,11 @@ jobs:
         run: |
           pacman -S --noconfirm mingw-w64-x86_64-cmake \
                                 mingw-w64-x86_64-ninja \
-                                mingw-w64-x86_64-python-pip \
-                                mingw-w64-x86_64-python-pillow \
-                                mingw-w64-x86_64-python-lz4 \
-                                mingw-w64-x86_64-libjpeg-turbo \
                                 mingw-w64-x86_64-zlib \
-                                mingw-w64-x86_64-libtiff \
-                                mingw-w64-x86_64-freetype \
-                                mingw-w64-x86_64-lcms2 \
-                                mingw-w64-x86_64-libwebp \
-                                mingw-w64-x86_64-openjpeg2 \
-                                mingw-w64-x86_64-libimagequant \
-                                mingw-w64-x86_64-libraqm \
                                 mingw-w64-x86_64-SDL2 \
-                                mingw-w64-x86_64-clang \
                                 mingw-w64-x86_64-nsis \
                                 mingw-w64-x86_64-dfu-util \
                                 mingw-w64-x86_64-openssl
-          python -m pip install --break-system-packages clang jinja2
 
       - name: Check out the repo
         uses: actions/checkout@v4
@@ -85,6 +72,11 @@ jobs:
           version: ${{ env.QT_VERSION }}
           arch: ${{ env.MINGW_VERSION }}
 
+      - name: Install Python Dependencies
+        run: |
+          echo $PATH
+          $Python3_ROOT_DIR/python3.exe -m pip install jinja2
+
       - name: Build
         working-directory: ${{github.workspace}}
         env: