refactor(pubsub): Use UA_Array_append and clean up in UA_Server_addDataSetField
refactor(pubsub): Use UA_Array_append and clean up in UA_Server_addDataSetField

StalderT/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541