Set the base_python version to 3.11

After moving in the container images to newer base system - Centos 9
Stream, we could also increase the Python version to be newer.

Change-Id: I67d7286ff0333849547cad882e854a8d952bb0db

.zuul.yaml

@@ -53,7 +53,7 @@
     dependencies:
       - name: openstack-tox-pep8
         soft: true
-      - name: openstack-tox-py39
+      - name: openstack-tox-py311
         soft: true
       - name: ci-log-processing-functional-test-centos-9-stream-sender
         soft: true
@@ -68,14 +68,14 @@
       jobs:
         - openstack-tox-linters
         - openstack-tox-pep8
-        - openstack-tox-py39
+        - openstack-tox-py311
         - ci-log-processing-build-image
         - ci-log-processing-functional-test-centos-9-stream-sender
     gate:
       jobs:
         - openstack-tox-linters
         - openstack-tox-pep8
-        - openstack-tox-py39
+        - openstack-tox-py311
         - ci-log-processing-functional-test-centos-9-stream-sender
         - ci-log-processing-build-image
     post:

Dockerfile

@@ -22,16 +22,16 @@ RUN groupadd logscraper --gid 1000 && \
     useradd --home-dir /home/logscraper --gid 1000 --uid 1000 logscraper
 
 RUN dnf update -y && \
-    dnf install -y python python-setuptools \
-                   python-devel python-pip git
+    dnf install -y python3.11 python3.11-setuptools \
+                   python3.11-devel python3.11-pip git gcc
 
 COPY . /tmp/src
 RUN cd /tmp/src && \
-    pip3 install -r requirements.txt && \
-    python3 setup.py install && \
+    pip3.11 install -r requirements.txt && \
+    python3.11 setup.py install && \
     rm -rf /tmp/src
 
-RUN dnf remove -y python3-devel git && \
+RUN dnf remove -y python3.11-devel git gcc && \
     dnf autoremove -y && \
     dnf clean all && \
     rm -rf ~/.cache/pip