Additional NUOPC_Connector ConnectionOptions

[theurich]

This is the second part of #300, which did not make it into ESMF 8.8.0:

In the ConnectionOptions attribute

• We already have dumpWeights. We need something like dumpCommMatrix to allow dumping of the communication matrix that is available on each RH. Not sure exactly how filename is specified here... need to think about that also for dumpWeights.