Use uv managed python in GHA workflows (Azure-Samples#2342)

Less overhead makes this easier to maintain and enables using hardlinking on Windows runners

Author: eifinger

.github/workflows/python-test.yaml

@@ -26,21 +26,15 @@ jobs:
       matrix:
         os: ["ubuntu-20.04", "windows-latest"]
         python_version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
-    env:
-      UV_SYSTEM_PYTHON: 1
     steps:
         - uses: actions/checkout@v4
-        - name: Setup python
-          uses: actions/setup-python@v5
-          with:
-            python-version: ${{ matrix.python_version }}
-            architecture: x64
         - name: Install uv
           uses: astral-sh/setup-uv@v5
           with:
             enable-cache: true
             version: "0.4.20"
             cache-dependency-glob: "requirements**.txt"
+            python-version: ${{ matrix.python_version }}
         - name: Setup node
           uses: actions/setup-node@v4
           with:
@@ -58,20 +52,20 @@ jobs:
         - name: Check types with mypy
           run: |
             cd scripts/
-            python3 -m mypy . --config-file=../pyproject.toml
+            mypy . --config-file=../pyproject.toml
             cd ../app/backend/
-            python3 -m mypy . --config-file=../../pyproject.toml
+            mypy . --config-file=../../pyproject.toml
         - name: Check formatting with black
           run: black . --check --verbose
         - name: Run Python tests
           if: runner.os != 'Windows'
-          run: python3 -m pytest -s -vv --cov --cov-fail-under=86
+          run: pytest -s -vv --cov --cov-fail-under=86
         - name: Run E2E tests with Playwright
           id: e2e
           if: runner.os != 'Windows'
           run: |
             playwright install chromium --with-deps
-            python3 -m pytest tests/e2e.py --tracing=retain-on-failure
+            pytest tests/e2e.py --tracing=retain-on-failure
         - name: Upload test artifacts
           if: ${{ failure() && steps.e2e.conclusion == 'failure' }}
           uses: actions/upload-artifact@v4