Converting notebooks from COSIMA Cookbook to ACCESS-NRI intake catalog

[navidcy]

Why we need to have two ways for people to load output? At the moment, after #298, we have tutorials both for the cookbook and for the ACCESS-NRI Intake catalog

https://cosima-recipes.readthedocs.io/en/latest/tutorials.html

Let's just leave the best of the two. Is ACCESS-NRI Intake catalog the future? Let's make that the default in all examples and drop the cookbook then?

cc @angus-g, @aidanheerdegen, @AndyHoggANU, @aekiss, @adele-morrison, @anton-seaice, @PaulSpence, @rmholmes, @edoddridge, @micaeljtoliveira