chore(maven): change to release-parent v2.4

related to #CAM-2727
chore(model-api): add @Deprecated annotation to methods

related to #CAM-2355
feat(bpmn-model): add TextAnnotation element

related to #CAM-2866
feat(bpmn-model): add multiInstanceLoopCharacteristics element

related to #CAM-2561
 chore(release): Prepare release: set version to 7.2.0-alpha6
 chore(release): Prepare next development version: 7.2.0-SNAPSHOT