Add tests with compartments updates in condition table

[FFroehlich]

Compartment size assignments are tricky since concentrations need to be updated via conversion to amounts. Should also cover compartment size updates due to changes in states/parameters that occur in size assignments, as well as concurrent update of compartment size AND concentration (in which case no conversion should be performed, if assignment in the condition table are handled the same as event/initial assignments).

[dweindl]

For PEtab v2, added in #80.