Add `Mutations::Vulnerabilities::RemoveAllFromProject`

What does this MR do and why?

This merge request adds Mutations::Vulnerabilities::RemoveAllFromProject which will cleanup all Vulnerabilities and related records from a project.

Related to #412602 (closed)

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

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.