CI: improve "test"section

Today the test section is repeating several command. The only difference is options provided to pytest. It could be defined through a variable (probably).

# test
test_python3.8:
  image: docker-registry.esrf.fr/dau/ewoks:python_3.8_glx
  extends: .build_template
  script:
    - python -m pip install pytest
    - python -m pip install silx tomoscan nxtomo --pre
    - python -m pip install -e .[test]
    - python -m pip install pytest-cov
    - python -m pytest --cov-config=.coveragerc --cov=nxtomomill nxtomomill/
  variables:
    TOMOTOOLS_SWMR: "False"

test_python3.11:
  image: docker-registry.esrf.fr/dau/ewoks:python_3.11_glx
  extends: .build_template
  script:
    - python -m pip install pytest
    - python -m pip install silx tomoscan nxtomo --pre
    - python -m pip install -e .[test]
    - python -m pip install pytest-cov
    - python -m pytest --cov-config=.coveragerc --cov=nxtomomill nxtomomill/ --capture=no --verbose
  variables:
    TOMOTOOLS_SWMR: "True"

test_python3.10:
  image: docker-registry.esrf.fr/dau/ewoks:python_3.10_glx
  extends: .build_template
  coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
  script:
    - python -m pip install pytest
    - python -m pip install silx tomoscan nxtomo --pre
    - python -m pip install -e .[test]
    - python -m pip install pytest-cov
    - python -m pytest --cov-config=.coveragerc --cov-report term-missing --cov-report html:code_coverage_infos --cov=nxtomomill nxtomomill/
    - mv code_coverage_infos artifacts/code_coverage
  artifacts:
    paths:
      - artifacts/code_coverage/
    when: on_success
    expire_in: 6h