Add NL Metoffice global

[peterdudfield]

Add option to save Metoffice global to NL (and probably BE too)

How to do this

• Find lat and lon coordiantes of NL and BE
• TODO add option code
• run locally to check it works

[peterdudfield]

Looks actually like nl is already there
https://github.com/openclimatefix/nwp-consumer/blob/main/src/nwp_consumer/internal/entities/modelmetadata.py#L176

but please test it locally to make sure