When copernicusmarine 2.1.0 is installed, MGET functions fail with ModuleNotFoundError: No module named 'copernicusmarine.download_functions.download_arco_series'

[jjrob]

The problem is that copernicusmarine moved the open_dataset_from_arco_series() function to a different module in their package. We need to adjust MGET's CMEMS.py code to account for this