CI: run pytest and install test against Python 3.10 (MR 2471)

Use Alpine 3.17 to test pmbootstrap with older versions of Python

Fixes: #2477
Suggested-by: Oliver Smith <ollieparanoid@postmarketos.org>
Signed-off-by: Caleb Connolly <caleb@postmarketos.org>

.gitlab-ci.yml

@@ -46,6 +46,11 @@ pytest:
       - "log_testsuite.txt"
       - "log.txt"
 
+# Ensure that tests pass on Python 3.10
+pytest-python3.10:
+  extends: pytest
+  image: alpine:3.17
+
 ruff:
   stage: lint
   script:
@@ -125,6 +130,11 @@ install amd64:
   # ARM64 on AMD64
     - .ci/integration_tests/build_images postmarketos-trailblazer console
 
+# Test that building images works on Python 3.10
+install amd64 python3.10:
+  extends: install amd64
+  image: alpine:3.17
+
 install aarch64:
   extends: .integration
   tags: [arm64]