[kie-issues#1610] Remove WorkItemDefinition mechanism

[josedee]

Closes apache/incubator-kie-issues#1610

Remove WorkItemDefinition mechanism from the Workflow engine (.wid) files support on the BPMN Editor / engine.

[yesamer]

HI @josedee, thank you for your PR.
I found some references of *.wid files in

• .gitignore files
• pom.xml related to springboot integration tests

To find them, you need to search *.wid key in the repo.
I guess we should remove them too, is that right @elguardian ?

[yesamer]

@josedee Thank you for applying the changes!

@josedee @elguardian @pefernan @martinweiler I noticed we have a lot of wid files in the repo (eg apache/incubator-kie-kogito-runtimes/jbpm/jbpm-flow-builder/src/test/resources/org/jbpm/process/workitem/repositorysingledir/repowid.wid), should we remove them all?

[yesamer]

@josedee Thank you!

[kie-ci3]

PR job #5 was: UNSTABLE
Possible explanation: This should be test failures

Reproducer

build-chain build full_downstream -f 'https://raw.githubusercontent.com/${AUTHOR:apache}/incubator-kie-kogito-pipelines/${BRANCH:main}/.ci/buildchain-config-pr-cdb.yaml' -o 'bc' -p apache/incubator-kie-kogito-runtimes -u #3766 --skipParallelCheckout

NOTE: To install the build-chain tool, please refer to https://github.com/kiegroup/github-action-build-chain#local-execution

Please look here: https://ci-builds.apache.org/job/KIE/job/kogito/job/main/job/pullrequest_jobs/job/kogito-runtimes-pr/job/PR-3766/5/display/redirect

Test results:

• PASSED: 3480
• FAILED: 1

Those are the test failures:

org.jbpm.bpmn2.IntermediateEventTest.testIntermediateCatchEventTimerCycle3

expected: 3
but was: 2