Generalise spatial coordinates in recipes

[jwarner8]

Something else

Currently some recipes like generic_domain_mean_vertical_profile_series.yaml and generic_surface_domain_mean_time_series.yaml use fixed spatial coordinates (e.g. L24);

  - operator: collapse.collapse
    coordinate: [grid_latitude, grid_longitude]
    method: MEAN

We have a function in utils which determines spatial coordinates, that we could use.

[jfrost-mo]

This helps with models that use latitude and longitude, like ACCESS-A.