Consider deprecating TestRestTemplate in favor of RestTestClient #46632
Description
As of spring-projects/spring-framework#34428, Spring Framework has a RestTestClient that aligns with WebTestClient. It supports testing real servers using RestClient as a transport, but also testing mock setups with MockMvc. Assertions and features are aligned with the latest in Framework (like API versioning).
We should consider whether we should deprecate TestRestTemplate as a result.