CI: switch to pyenv for better python2 support

since we need to run older versions of scylla with cqlsh that only
support python2, we need a way to still have python2 available

Author: fruch

.github/workflows/integration-tests.yml

@@ -18,38 +18,39 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            python-version: "3.8"
+            python-version: "3.8.16"
             event_loop_manager: "libev"
 
           - os: ubuntu-latest
-            python-version: "3.8"
+            python-version: "3.8.16"
             event_loop_manager: "asyncio"
 
           - os: ubuntu-latest
-            python-version: "3.8"
+            python-version: "3.8.16"
             event_loop_manager: "asyncore"
 
           - os: ubuntu-latest
-            python-version: "3.11"
+            python-version: "3.11.1"
             event_loop_manager: "libev"
 
           - os: ubuntu-latest
-            python-version: "3.11"
+            python-version: "3.11.1"
             event_loop_manager: "asyncio"
 
           - os: ubuntu-latest
-            python-version: "3.11"
+            python-version: "3.11.1"
             event_loop_manager: "asyncore"
 
           - os: ubuntu-latest
-            python-version: "3.12"
+            python-version: "3.12.0"
             event_loop_manager: "libev"
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+    - name: setup pyenv ${{ matrix.python-version }}
+      uses: "gabrielfalcao/pyenv-action@v11"
       with:
-        python-version: ${{ matrix.python-version }}
+        default: 2.7.14
+        versions: ${{ matrix.python-version }}
     - name: Test with pytest
       run: |
         export EVENT_LOOP_MANAGER=${{ matrix.event_loop_manager }}