Provide GraphQL examples equivalent to Vulnerabilities REST API

What does this MR do and why?

Given the upcoming announcement of the deprecation of Vulnerabilities REST API, we want to provide examples that make it easier for users to start using the GraphQL API and replacing the soon-to-be-deprecated endpoints.

Screenshots or screen recordings

These are strongly recommended to assist reviewers and reduce the time to merge your change.

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.