Resolve "Use mock-apollo-client within the pipeline security dashboard specs"

What does this MR do and why?

This MR adds a "mockApollo" setup to the specs for the pipeline-security-dashboard and uses it in place of passing the data directly into the component-setup.

Screenshots or screen recordings

N/A

How to set up and validate locally

N/A

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.

Related to #333357 (closed)