Don't exit based on number of vulnerabilities

What does this MR do?

Removes the exit handling for when vulnerabilities are found. I believe this is causing our reports to be ignored https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6786#note_933660024

From: https://docs.gitlab.com/ee/development/integrations/secure.html#exit-code

Success also includes the case when vulnerabilities are found.

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6786

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer