If we're forcing CI, set package-and-qa manual

What does this MR do and why?

If we're forcing CI, set package-and-qa manual

This way when we want to run QA for a particular branch, we can

Internal Slack context and gitlab-org/release/tasks#3621 (comment 886039659)

Screenshots or screen recordings

Testing pipeline: https://gitlab.com/gitlab-org/gitlab/-/pipelines/495620046

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.