Refactor specs to use new GraphQL shared examples

What does this MR do and why?

This MR refactors some specs to use new GraphQL shared examples introduced in #419768.

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 #419768