Add auto_cancel:on_new_commit to canceling redundant pipelines

What does this MR do and why?

---

This is the fourth step of #412473 (closed).

1. Add auto_cancel_on_new_commit to ci_pipeline_me... (!137520 - merged)
2. Add new syntax of workflow:auto_cancel:on_new_c... (!137892 - merged)
3. Add `interruptible` to trigger jobs (!138508 - merged)
4. <--HERE-->
5. workflow:rules:auto_cancel (#436467 - closed)

---

In this change, we are using auto_cancel_on_new_commit in CancelRedundantPipelinesService and adding safe_cancellation to CancelPipelineService.

These changes are behind the FF ci_workflow_auto_cancel_on_new_commit (#434676 (closed)).

Screenshots or screen recordings

Enable the FF:

Feature.enable(:ci_workflow_auto_cancel_on_new_commit)

Example config;

workflow:
  auto_cancel:
    on_new_commit: interruptible

test1:
  script: sleep 1

test2:
  script: sleep 60
  interruptible: false

test3:
  script: sleep 60
  interruptible: true

Create a pipeline;

Send another commit and see the previous pipeline;

MR acceptance checklist

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