Missing parameters in `findAssembly` docs

[keckler]

The table in the docs that outlines how to select specific assemblies using the findAssembly method is incomplete. It is missing parameters which are accepted by findAssembly (see here).

Instead of just adding the missing parameters, it would probably be best to programmatically generate the table based on the docstring.

[ntouran]

Yeah we might want to just delete that table entirely and link to the auto-generated docs based on the docstring. (Our sphinx documentation system builds docs based on docstrings already): https://terrapower.github.io/armi/.apidocs/armi.physics.fuelCycle.fuelHandlers.html?highlight=findassembly#armi.physics.fuelCycle.fuelHandlers.FuelHandler.findAssembly