Resolve "Zora is not working with vector potentials"
Description
The current ZORA implementation is missing the terms for the vector potentials. We need to add an error message and stop the code if a user tries that combination.
News snippet
Add an error message and stop the code if a user tries that combination.
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.
Closes #741 (closed)