[incubator-kie-issues-1557] Marshalling POJO Input/output in user task

[elguardian]

Closes: apache/incubator-kie-issues#1557

[martinweiler]

I see an error in one of the IT:

$ cat quarkus/integration-tests/integration-tests-kogito-plugin/target/it/integration-tests-kogito-plugin-it/target/surefire-reports/org.acme.travels.PersonProcessTest.txt
-------------------------------------------------------------------------------
Test set: org.acme.travels.PersonProcessTest
-------------------------------------------------------------------------------
Tests run: 2, Failures: 0, Errors: 1, Skipped: 1, Time elapsed: 4.456 s <<< FAILURE! -- in org.acme.travels.PersonProcessTest
org.acme.travels.PersonProcessTest.testAdult -- Time elapsed: 0.007 s <<< ERROR!
java.lang.RuntimeException: 
java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
	[error]: Build step io.quarkus.arc.deployment.ArcProcessor#generateResources threw an exception: jakarta.enterprise.inject.spi.DeploymentException: Found 4 deployment problems: 
[1] The method validateBaseType in the ANONYMOUS class org.kie.kogito.app.UserTasksResource$2 declares an interceptor binding but it must be ignored per CDI rules
[2] The method validateSubClassName in the ANONYMOUS class org.kie.kogito.app.UserTasksResource$2 declares an interceptor binding but it must be ignored per CDI rules
[3] The method validateSubType in the ANONYMOUS class org.kie.kogito.app.UserTasksResource$2 declares an interceptor binding but it must be ignored per CDI rules
[4] The method handleMissingTypeId in the ANONYMOUS class org.kie.kogito.app.UserTasksResource$1 declares an interceptor binding but it must be ignored per CDI rules

[martinweiler]

LGTM @elguardian