ci: Fix hierarchicalforecast downstream test

Author: FBruzzesi

.github/workflows/downstream_tests.yml

@@ -358,17 +358,16 @@ jobs:
           cache-dependency-glob: "pyproject.toml"
       - name: clone-hierarchicalforecast
         run: |
-          git clone https://github.com/Nixtla/hierarchicalforecast --depth=1
+          git clone https://github.com/Nixtla/hierarchicalforecast --depth=1 --recurse-submodules --shallow-submodules
           cd hierarchicalforecast
           git log
       - name: install-basics
         run: uv pip install --upgrade tox virtualenv setuptools
       - name: install-deps
         run: |
           cd hierarchicalforecast
-          # Temporary pin until it's addressed upstream.
-          uv pip install "pandas<3"
-          uv pip install . --group dev --group polars
+          uv pip install datasetsforecast "statsforecast>=1.0.0" scipy "polars[numpy]<=1.32.0" pytest pytest-benchmark pytest-cov
+          uv pip install .
       - name: install-narwhals-dev
         run: |
           uv pip uninstall narwhals
@@ -378,7 +377,8 @@ jobs:
       - name: Run tests
         run: |
           cd hierarchicalforecast
-          pytest tests
+          pytest tests --no-cov --import-mode=importlib 
+
 
   formulaic:
     strategy: