VED-79: setting python version to 3.11

Author: Akol125

azure/templates/post-deploy.yml

@@ -87,6 +87,9 @@ steps:
 
   - bash: |
       echo "Subscribing SQS to MNS for notifications."
+      pyenv local 3.11
+      poetry env use 3.11
+      poetry install --no-root
       poetry run python src/subscribe_mns.py
     displayName: "Run MNS Subscription"
     workingDirectory: "$(Pipeline.Workspace)/s/$(SERVICE_NAME)/$(SERVICE_ARTIFACT_NAME)/mns_subscription"