introduce taglist entry for Remanent Data responsibility

As of PRODPNMV3-312 the common startup with DDP active/passive state is introduced into Profinet Controller firmware. Besides waiting for DDP to enter "active" state, this startup also requires loading remanent before the firmware shall accept any configuration data. (Kind of startup barrier). Up to now the firmware does not know who is responsible for remanent data.

Therefore, the well-defined taglist entry for remanent data responsibility shall be added to all firmwares.

By default, firmware shall store remanent data.