Updates related merge requests to fetch from GraphQL
What does this MR do and why?
Updates the related merge requests widget to fetch data from the GraphQL API instead of the REST API. The GraphQL endpoint will perform better by only fetching the data that we require.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.