Support licenses and performance

What does this MR do?

This introduces a new syntax for license and performance reports, moving away from job-keywords into a new reports: syntax:

job:
  reports:
    performance: performance.json
    license_management: gl-license-management-report.json

What are the relevant issue numbers?

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/52323

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides