Add support for Spring WebTestClient in the generated test files, besides RestAssured

[swtestacademy]

Alon with Rest-Assured another HTTP test client library (Spring WebTestClient) support addition will help the teams who are only using Spring Only ecosystem libraries and tools.

[arcuri82]

Hi, at the moment there is no plan to support WebTestClient. There are a lot features in EM that are still missing, and supporting something like WebTestClient is unfortunately not high priority, as it is something that is specific to Spring, and RestAssured would still work there. But if many people ask for it, we could consider to add it (it should't be more than a few days work).

It might well be that WebTestClient is better than RestAssured, but, for automatically generated test classes, it should not really matter. Unless, of course, one wants to modify the generated tests manually, or simply want to keep consistency inside the project.