Use AWG driver from qcodes contrib

Created by: sldesnoo-Delft

The pulse library uses a mix of Python and C API of Keysight SD1. There is a new fully Python qcodes driver with the same functionality. https://github.com/sldesnoo-Delft/Qcodes_contrib_drivers/tree/KeysightM3202A

Note: the pulse lib modifications will stay on a branch as long as the Keysight M3202A driver has not been merged to the QCoDeS repository.

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