Allow Package and QA Executions for Security MRs

What does this MR do?

Allow Package and QA Executions for Security MRs

• Testing merge request: https://gitlab.com/gitlab-org/security/gitlab/-/merge_requests/605
  • package-and-qa: https://gitlab.com/gitlab-org/security/gitlab/-/jobs/581845395
  • omnibus-gitlab-mirror: https://gitlab.com/gitlab-org/build/omnibus-gitlab-mirror/-/pipelines/153002321
  • gitlab-qa-mirror: https://gitlab.com/gitlab-org/gitlab-qa-mirror/-/pipelines/153016697
• Supporting omnibus-gitlab: omnibus-gitlab!4302 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Documentation (if required)

Closes https://gitlab.com/gitlab-org/security/gitlab/-/issues/67