Update the docker image to python3.11

OpenDev is trying to get consumers of these images to update to newer
iterations so that old images can be dropped from the build list. OSC
is successfully running voting python3.11 unittest jobs at this point.
This should make it safe to update the Docker container image for OSC
to python3.11 without risk of regressions.

Making this update should bring some (small) performance updates as
py311 is generally quicker than py310. As mentioned before it will also
allow OpenDev to reduce the set of images that are being built.

Change-Id: I01e3c9e27f92205979ea6562b23f0f7f3b431728

.zuul.yaml

@@ -161,8 +161,8 @@
     description: Build Docker images.
     allowed-projects: openstack/python-openstackclient
     requires:
-      - python-builder-3.10-bookworm-container-image
-      - python-base-3.10-bookworm-container-image
+      - python-builder-3.11-bookworm-container-image
+      - python-base-3.11-bookworm-container-image
     provides: osc-container-image
     vars: &osc_image_vars
       docker_images:
@@ -175,8 +175,8 @@
     description: Build Docker images and upload to Docker Hub.
     allowed-projects: openstack/python-openstackclient
     requires:
-      - python-builder-3.10-bookworm-container-image
-      - python-base-3.10-bookworm-container-image
+      - python-builder-3.11-bookworm-container-image
+      - python-base-3.11-bookworm-container-image
     provides: osc-container-image
     secrets:
       - name: docker_credentials

Dockerfile

@@ -13,12 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/opendevorg/python-builder:3.10-bookworm as builder
+FROM docker.io/opendevorg/python-builder:3.11-bookworm as builder
 
 COPY . /tmp/src
 RUN assemble
 
-FROM docker.io/opendevorg/python-base:3.10-bookworm
+FROM docker.io/opendevorg/python-base:3.11-bookworm
 
 COPY --from=builder /output/ /output
 RUN /output/install-from-bindep