Tests InputOutput read are not very stringent

[Sbozzolo]

I am finding in ClimaAtmos that there are some issues with reading vectors from HDF5 files. Indeed, this is not something that is carefully checked by the current tests. For example,

ClimaCore.jl/test/InputOutput/hybrid2dbox.jl

Lines 107 to 118 in a084cc8

	uₕ = map(_ -> Geometry.Covariant1Vector(0.0), coords)
	w = map(_ -> Geometry.Covariant3Vector(0.0), face_coords)
	Y = Fields.FieldVector(Yc = Yc, uₕ = uₕ, w = w)
	# write field vector to hdf5 file
	filename = tempname()
	writer = InputOutput.HDF5Writer(filename, context)
	InputOutput.write!(writer, "Y" => Y) # write field vector from hdf5 file
	reader = InputOutput.HDF5Reader(filename, context)
	restart_Y = InputOutput.read_field(reader, "Y") # read fieldvector from hdf5 file
	close(reader)
	@test restart_Y == Y # test if restart is exact

only checks trivial vectors of 0.

The extruded case doesn't even check for vectors.