Improve the only/except extendable jobs

What does this MR do?

1. Factorize the

   variables:
     - $CI_SERVER_HOST == "gitlab.com" && $CI_PROJECT_NAMESPACE == "gitlab-org"

   into a new .only:variables-canonical-dot-com extensible job.
2. Extract kubernetes: active to a new .only:kubernetes extensible job.
3. Rename .only-canonical-schedules to .only:variables_refs-canonical-dot-com-schedules and make it extend from .only:variables-canonical-dot-com.
4. Extract

   except:
     refs:
       - /^\d+-\d+-auto-deploy-\d+$/

   to a new .except:refs-deploy extensible job.
5. Extract

   except:
     refs:
       - master
       - tags
     variables:
       - $CI_COMMIT_REF_NAME =~ /^[\d-]+-stable(-ee)?$/

   to a new .except:refs-master-tags-stable-deploy extensible job.
6. Use the new extensible jobs where possible.
7. Use the .keyword:attribute-description-of-the-job convention, e.g. .except:refs-deploy only includes the except keyword, with the refs attributes, and it's description is deploy.