Heavy CI refactoring

Created by: cathales

• This PR simplifies CI description:
  • defining job types that handle:
    • pipeline stages
    • conditions to run the jobs
    • before_script
    • after_script
  • using of the default: GitLab keyword for tags and artifacts
• It removes the silencing of smoke-test failures, so that regress and verif tests do not run if a smoke test fails; to not waste resources.
• It performs additional cleanup removing an unused .patch file and fixing smoke-gen_tests which was silently failing

Documentation will be updated in a subsequent PR.