TotalSurface and AbsorbedHydrogen raise warnings in cartesian

[RemDelaporteMathurin]

We noticed in festim-dev/FESTIM-workshop#67 that the derived quantities TotalSurface and AbsorbedHydrogen raised a warning even when used in cartesian meshes.

AbsorbedHydrogen should work with any system of coordinates.
TotalSurface shouldn't raise a warning in cartesian.

We should add them to:

FESTIM/festim/generic_simulation.py

Lines 360 to 379 in 40cdd22

	# raise warning if the derived quantities don't match the type of mesh
	# eg. SurfaceFlux is used with cylindrical mesh
	all_types_quantities = [
	festim.MaximumSurface,
	festim.MinimumSurface,
	festim.MaximumVolume,
	festim.MinimumVolume,
	festim.PointValue,
	] # these quantities can be used with any mesh
	allowed_quantities = {
	"cartesian": [
	festim.SurfaceFlux,
	festim.AverageSurface,
	festim.AverageVolume,
	festim.TotalVolume,
	]
	+ all_types_quantities,
	"cylindrical": [festim.SurfaceFluxCylindrical] + all_types_quantities,
	"spherical": [festim.SurfaceFluxSpherical] + all_types_quantities,
	}