Removes interaction with EOC and Release Managers as a step to FF rollout

What does this MR do?

Proposes a change to the Feature Flag Roll Out template removing the need to get a go-ahead from the engineer on call and release manager. Related to gitlab-com/gl-infra/delivery#1473 (closed)

The EOC has been tagged as a human-based check point to ensure operational safety, but now that ChatOps has an automatic stop when an incident is ongoing, this removes the need for this check. Additionally getting the EOC to review requires context the SRE may not have and likely does not have time during their shift to build.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

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Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
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Security

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