CI: add integration tests with python 3.13

since we want to start test the alpha/beta version of python
refactoring a bit the integration test workflow

the action for pyenv we are using isn't really getting updates
too much, and trying to switch back to the offical use python action
that can now have prerelease python versions

also move to test newer scylla version which are not depended on
python2 anymore, which was the main reason for using pyenv

.github/workflows/integration-tests.yml

@@ -16,23 +16,27 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8.17", "3.11.4", "3.12.0b4"]
+        python-version: ["3.8", "3.11", "3.12", "3.13"]
         event_loop_manager: ["libev", "asyncio", "asyncore"]
         exclude:
-          - python-version: "3.12.0b4"
+          - python-version: "3.13"
+            event_loop_manager: "asyncore"
+          - python-version: "3.13"
             event_loop_manager: "asyncore"
 
     steps:
-    - uses: actions/checkout@v3
-    - name: setup pyenv ${{ matrix.python-version }}
-      uses: "gabrielfalcao/pyenv-action@v16"
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
+      name: Install Python
       with:
-        default: 2.7.14
-        versions: ${{ matrix.python-version }}
+        python-version: "${{ matrix.python_version }}"
+        allow-prereleases: true
+
     - name: Test with pytest
       run: |
         export EVENT_LOOP_MANAGER=${{ matrix.event_loop_manager }}
-        export SCYLLA_VERSION='release:5.1'
+        export SCYLLA_VERSION='release:5.4'
         ./ci/run_integration_test.sh tests/integration/standard/ tests/integration/cqlengine/
     
     - name: Test tablets