OZG-6748 Avoid use of clearZustaendigeStelles

...ozgcloud/eingang/common/formdata/FormDataTestFactory.java

...a/de/ozgcloud/eingang/router/GrpcEingangMapperITCase.java

...t/java/de/ozgcloud/eingang/router/VorgangServiceTest.java

.../semantik/enginebased/afm/AfmZustaendigeStelleMapper.java

...ntik/enginebased/afm/ZustaendigeStelleMetadataMapper.java

...erdermittel/DFoerdermittelEngineBasedSemantikAdapter.java

...d/formsolutions/FormSolutionsZustaendigeStelleMapper.java

...sed/mantelantrag/MantelantragZustaendigeStelleMapper.java

.../enginebased/afm/ZustaendigeStelleMetadataMapperTest.java

...rmittel/DFoerdermittelEngineBasedSemantikAdapterTest.java

...rmsolutions/FormSolutionsZustaendigeStelleMapperTest.java