Add manhattan layout to gatemap visualization (#5064)
Add manhattan layout to gatemap visualization (#5064)

This commit adds support for plot_gate_map() and its derivatives to
visualize the ibmq_manhattan device map. This was previously missing
from the supported qubit counts which would result in an error when
trying to visualize the gate map of the device.

The actual values here are sourced from nonhermitian/kaleidoscope#37
QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py