Switch to ubuntu-22.04 for CI tests

An issue with oscrypto means it currently does not work on 24.04. Ref: https://github.com/wbond/oscrypto/issues/78#issuecomment-2565688091

.github/workflows/tests-download.yaml

@@ -10,8 +10,9 @@ on:
 
 jobs:
   tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
+      fail-fast: false
       matrix:
         python-version: ["3.10"] # only run expensive downloads on one (lowest) python version
     defaults:
@@ -21,34 +22,17 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install poetry
+        run: pipx install poetry
+
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-
-      - name: Install Poetry
-        uses: snok/install-poetry@v1
-        with:
-          virtualenvs-create: true
-          virtualenvs-in-project: true
-          virtualenvs-path: .venv
-
-      - name: Load cached venv
-        id: cached-poetry-dependencies
-        uses: actions/cache@v4
-        with:
-          path: .venv
-          key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}-dev
+          cache: 'poetry'
 
       - name: Install dependencies
-        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
-        run: poetry install --no-interaction --no-root --with dev
-      
-      - name: Install project
-        run: poetry install --no-interaction
+        run: poetry install --no-interaction --with dev
 
       - name: Run Download Tests
-        run: |
-          source .venv/bin/activate
-          pytest -ra -v -m "download"
-          coverage report
+        run: poetry run pytest -ra -v -m "download"