OZG-7608 OZG-7736 Implement findDeleted

...va/de/ozgcloud/apilib/vorgang/OzgCloudVorgangService.java

...cloud/apilib/vorgang/grpc/GrpcOzgCloudVorgangService.java

...gcloud/apilib/vorgang/grpc/OzgCloudVorgangStubMapper.java

.../java/de/ozgcloud/apilib/vorgang/grpc/StreamingUtils.java

...gcloud/apilib/vorgang/OzgCloudVorgangStubTestFactory.java

...organg/grpc/GrpcFindDeletedVorgangRequestTestFactory.java

...rgang/grpc/GrpcFindDeletedVorgangResponseTestFactory.java

...d/apilib/vorgang/grpc/GrpcOzgCloudVorgangServiceTest.java

...ud/apilib/vorgang/grpc/OzgCloudVorgangStubMapperTest.java

...a/de/ozgcloud/apilib/vorgang/grpc/StreamingUtilsTest.java

pom.xml