[CI] Switch official version to Python 3.11 (Deb 12) + cleanup other jobs

- Remove Python 3.7 test
- Add Python 3.11 test and move coverage to it
- Change dedicated Debian 10 runner to dedicated Debian 12 one

.gitlab-ci.yml

@@ -76,11 +76,11 @@ qa-mypy:
     #- poetry run pytest --junitxml=tests_report.xml --cov ecs_core tests/test_*
     - poetry run pytest tests/test_Messages.py tests/test_States.py tests/test_EcsLogger.py tests/test_StateCoreAgent.py tests/test_StateCoreTester.py tests/test_CmdCoreAgent.py tests/test_BaseCmdTester.py tests/test_StateCmdAgent.py tests/test_EcsConfServ.py tests/test_EcsCoreAgent.py
 
-# Test and coverage Jobs
-# => Official version = the one used by main dev (PAL), official python package under Ubuntu 20.04
-test-python3.8:
+# Test and coverage Job
+# => Official version = the one matching PCs in mCBM control room, official python package under Debian 12
+test-python3.11:
   <<: *test-tmpl
-  image: python:3.8
+  image: python:3.11
   tags:
   - docker-ecs
   coverage: '/TOTAL.*\s+(\d+%)$/'
@@ -99,12 +99,22 @@ test-python3.8:
     paths:
       - public
 
-test-python3.7:
+# Test job same OS as control room
+test-debian12:
   <<: *test-tmpl
-  image: python:3.7
-  needs: ["test-python3.10"]  # try to avoid these tests running in //, just in case proba of having ZMQ name conflicts
-  allow_failure: true
+  tags:
+    - ecs-proto
 
+# Test jobs old version of Python
+# => version used originally by main dev (PAL), official python package under Ubuntu 20.04
+test-python3.8:
+  <<: *test-tmpl
+  image: python:3.8
+  tags:
+  - docker-ecs
+  needs: ["test-python3.11"]  # try to avoid these tests running in //, just in case proba of having ZMQ name conflicts
+
+# => Version available in mFLES under Ubuntu 22.04
 test-python3.10:
   <<: *test-tmpl
   image: python:3.10
@@ -113,11 +123,6 @@ test-python3.10:
   needs: ["test-python3.8"]  # try to avoid these tests running in //, just in case proba of having ZMQ name conflicts
   allow_failure: true
 
-test-debian10:
-  <<: *test-tmpl
-  tags:
-    - ecs-proto
-  allow_failure: true
 
 # Package and deploy: install only non-dev packages in poetry
 build-publish: