Add NVLink / NVSwitch status to node list
Per @bryank :
It's unclear how to best do this. The topology of the links varies from node-to-node (see https://gitlab.rc.umass.edu/unity/admin/ansible/-/blob/3121e01878e63bd42fad5132ccd304d2824af642/files/gres.conf). In some nodes there are only pairs of GPUs, whereas in other nodes there are links between all the cards. In both cases the number/bandwidth between the links varies as well.