See KOGITO-3088.

As a developer, I wish to have the possibility to add a custom service task on a BPMN diagram that has a configurable REST client. This way, I could call REST services without additional custom code.

Context
As part of the codegen, when inspecting a Serverless Workflow file with a function definition of type "rest", the Kogito core engine would generate Camel routes to handle REST calls. The same must be made for BPMN. In this scenario, the information about the REST service must came from the BPMN file instead.

Documentation: https://docs.google.com/document/d/1GgAEAAoiBWsQ3zDKsW_w_Uml4cg5C5dnG6tlGQZlY0g