Properly process all needs

What does this MR do?

Properly process needs: with when:

Currently, some of the jobs with needs: would be processed in stages, it means that when: for such jobs would not be respected.

This changes the behaviour to have a separate execution paths for jobs with needs:.

Example

build-a:
  stage: build
  script: sleep 60s

build-b:
  stage: build
  script: false

notify-a:
  stage: deploy
  needs: [build-a]
  when: on_failure

• The notify-a will be wrongly executed, even though build-a did finish.
• The notify-a should be skipped in such case.

References

Resolve https://gitlab.com/gitlab-org/gitlab-ce/issues/65488

Related https://gitlab.com/gitlab-org/gitlab-ce/issues/65457 https://gitlab.com/gitlab-org/gitlab-ce/issues/65486

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides