refactor: Update the shell script that build wheels

- Update Gecode version to the last one
- To build rql wheels, starts with Python 3.7 version
- Use pip flag --use-feature=in-tree-build, and deal with the following warning:

    DEPRECATION: A future pip version will change local packages to be built
    in-place without first copying to a temporary directory. We recommend you use
    --use-feature=in-tree-build to test your packages with this new behavior
    before it becomes the default.
       pip 21.3 will remove support for this functionality. You can find
    discussion regarding this at https://github.com/pypa/pip/issues/7555.
7 jobs for !58 with topic/default/minimum-python-version in 36 seconds (queued for 7 seconds)
latest detached
Status Name Job ID Coverage
  Tests
canceled black #414738

00:00:29

canceled check-manifest #414740

00:00:26

canceled flake8 #414737

00:00:32

canceled mypy #414739

00:00:28

canceled py3 #414735

00:00:36

canceled py3-from-forge #414736

00:00:34

 
  After Tests
canceled trigger-cubicweb-pipeline