install Python 3.10 on Windows when not using the docker image

Author: matthewbastien

.github/workflows/swift_package_test.yml

@@ -628,6 +628,13 @@ jobs:
         exclude:
           - ${{ fromJson(inputs.windows_exclude_swift_versions) }}
     steps:
+      - name: Install Python 3.10
+        if: ${{ !inputs.enable_windows_docker }}
+        uses: actions/checkout@v5
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.10'
+        run: python my_script.py
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Checkout swiftlang/github-workflows repository