Process data frames of application-triggered connections shall be triggerable individually

Currently, when updating the assembly instance's data (by call of CIPHIL_CMD_AS_UPDATE_PRODUCING) all assembly instance's data gets updated. At the same time, if the assembly is part of an application-triggered connection, the process data frame for that specific connection is sent on the network.

Problem:
When multiple application-triggered connections running at the same time, the current implementation will trigger process data frames for all connections. The application has no option to choose the connection for which a new process data frame should be triggered.

Therefore, a new mechanism shall be implemented that gives the host application the option to choose the assembly instances for which new data frame is triggered.