Prevent deletion of tcp-lite connector and listener pseudo connections

[kgiusti]

The tcp-lite adaptor creates pseudo core connections corresponding to tcpConnector and tcpListener instances. Management should not be allowed to disable/delete these connections directly. The connection's lifecycle corresponds to its owning tcpConnector/tcpListener and will be deleted when those objects are deleted.

Similar issue to #1225 seen in the legacy tcp adaptor.

[kgiusti]

The fix for this needs to have the TCP adaptor management CI tests enabled for tcp-lite. These test exercise the related failure case.