PIM removes dynamic task description of Human Tasks

After migrating a process instance, the "Description" property of human tasks is without content. Before the process is migrated, the task has a value in that field.

During tests, if the "Description" property contains a fixed value, after migrating its value is preserved. Conversely, if the property has variable data (for example #{my_data}), after migration the "Description" field is shown blank.

Note: this is caused by changes from https://issues.redhat.com/browse/JBPM-9507 

Community issue: https://github.com/kiegroup/kie-issues/issues/386