Fetch trace related issues

What does this MR do and why?

Add RelatedIssuesProvider component to TracingDetails. The component is responsible for fetching issues related to a trace from GraphQL and pass it to the default slot (component developed separately gitlab-org/opstrace/opstrace#2905 (closed)). Note the GraphQL API is still being developed ( gitlab-org/opstrace/opstrace#2904 (closed) ), so we are temporarily just fetching project issues for development purpose.

This feature is under feature flag and in experimental phase.

Relates to gitlab-org/opstrace/opstrace#2906 (closed)

MR acceptance checklist

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Screenshots or screen recordings

NA

Before	After

How to set up and validate locally

• Run specs