Print ZAP metadata using build tool

What does this MR do?

Adds Invoke to DAST. Invoke is a simple build tool for Python.

The first task added is a task that given the name of a ZAP addon, it will print the metadata of that tool. This is useful when upgrading ZAP addons.

The task can be run using invoke zapmetadata --addon ascanrulesBeta.

Screenshot

What are the relevant issue numbers?

gitlab-org/gitlab#220126 (closed)

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
  • Job definition example
  • Vendored CI Templates (also in CE)
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer