allowed_meshes property for derived quantities

[RemDelaporteMathurin]

Proposed changes

Fix for #829

This PR proposes to change the approach for knowing if certain quantities are allowed with various systems of coordinates (cartesian, cylindrical, spherical).

Instead of having a long list of allowed quantities for each mesh type in Simulation.initialise - which was very hard to maintain -, each quantity now has a property called allowed_meshes that is a list of mesh types that this property can be used with.
By default, the three mesh types are allowed.

When inheriting from the parent class, it is possible to override this property.

Types of changes

What types of changes does your code introduce to FESTIM?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code refactoring
• Documentation Update (if none of the other choices apply)
• New tests

Checklist

• Black formatted
• Unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[RemDelaporteMathurin]

@jhdark would you mind giving this a look? also, if we agree to go with this system, then you would have to add the same changes in #410

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.56%. Comparing base (40cdd22) to head (2a99ee3).
Report is 80 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #832   +/-   ##
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  Coverage   99.55%   99.56%           
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  Files          61       61           
  Lines        2718     2741   +23     
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+ Hits         2706     2729   +23     
  Misses         12       12           

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[jhdark]

looks good to me