Migrate process test migration from v7 legacy runtime to code generation

[elguardian]

At this point some of the bpmn can be compiled. This test right now are using legacy v7 Kie session.
The idea is to migrate those to code generation

Those test can be told by
https:/apache/incubator-kie-kogito-runtimes/blob/main/jbpm/jbpm-tests/src/test/java/org/jbpm/bpmn2/ActivityTest.java

where the bpmn is in the folder src/test/bpmn

https:/apache/incubator-kie-kogito-runtimes/blob/main/jbpm/jbpm-tests/src/test/java/org/jbpm/bpmn2/ActivityTest.java#L103

an example of migration is
https:/apache/incubator-kie-kogito-runtimes/blob/main/jbpm/jbpm-tests/src/test/java/org/jbpm/bpmn2/ResourceTest.java#L37