Create a RestClient alternative to WebTestClient and TestRestTemplate

[plebcity]

Since Spring Boot 3.2 we are using RestClient in our production code and we love it but for our Controller/Integration tests there isn't an easy way to create and/or inject a RestClient with all configuration necessary to make requests to the controllers.

I would love to have a preconfigured bean like WebTestClient and TestRestTemplate that we can inject into our tests.

[wilkinsona]

Thanks for the suggestion. This is a duplicate of spring-projects/spring-framework#31275.