Rules can't be easily combined in user jobs

With the actual definition, redefining the rules for a jobs require a complete copy&paste of predefined rules like in template/Release/Semantic-release.yaml.

The new 14.3 release of Gitlab support merging rules with `!reference but, as a workaround, we could define a single hash of individual rules to be references, like:

.rule_references:
  no_schedule:
    if: $CI_PIPELINE_SOURCE == "schedule"
    when: never
  no_tag:
    if: $CI_COMMIT_TAG
    when: never

job5:
  image: alpine:latest
  rules:
    - !reference [.rule_references, no_schedule]
    - !reference [.rule_references, no_tag]
    - when: on_success
  script:
    - echo "run except schedules and tags"