summer 2022 work- SBC halo cleanup

Context

Please provide informations on how to set the modelling environment

Reference configuration/test case (to add, chosen or used as template)
Modifications of versioned files: Fortran routines (*.[Ffh]90), namelists (namelist\_*cfg), outputs settings (*.xml), ...
Additional dependencies
New datasets
Any other relevant information

Proposal

Please share your ideas or your wishes about modelling improvements for the NEMO model.
In particular, express if you are willing to contribute personally to the implementation of this feature in NEMO.

You can

📋 Copy code blocks (```fortran ...```) or diff outputs (```diff ...```)
📎 Include files
🔗 Add external links.

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