This commit adds the `@GraphQlTest` annotation which brings a new type
of sliced test for GraphQL applications. This considers all the required
infrastructure brought by `@AutoConfigureGraphQl`, but also brings
application components like `@Controller` beans and
`RuntimeWiringConfigurer`.
With this type of test, we'll only initialize a minimal setup for
testing a set of Controllers, without involving any transport-related
component.
See gh-29140
a34308e5f7