Add GraphQL operation name to performance bar

What does this MR do and why?

Adds the operation name to the performance bar request selector to make it easier to identify GraphQL requests

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Enable the performance bar
2. Visit a page that makes GraphQL requests (the issues list page)
3. Check the request selector in the performance bar

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.