Station update at start of do1d/do2d

[ThorvaldLarsen]

It would be nice to have the option to do a full station update at the beginning of each do1d/do2d scan. This is especially useful when having virtual instruments that inherits parameters from other instruments.

F.ex. I make a qc.Parameter() that changes two channels on the qdac. When sweeping this parameter the metadata of the qdac is not updated meaning the saved voltages are wrong.

[jenshnielsen]

We should look into this and figure out why its not updating. I would expect it to do that. Updating the station is likely to be very expensive so it would be best to avoid that