Add queriess to auto-generated graphqL docs

What does this MR do?

It adds queries to the generated graphQL documentation.

Screenshots (strongly suggested)

Generated documentation: https://gitlab.com/gitlab-org/gitlab/-/blob/eab4980fdb590097e5af4d536b55c5120938cc24/doc/api/graphql/reference/index.md#queries

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.

Related to #30010 (closed)