bug: native Exceptions in `get_variable_ids` are not surfaced immediately

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This was noticed in a notebook. Not a serious bug, but puzzling to observe first.

Repro is e.g. if calling sim.get_variable_ids(element_id="node.123.ec") where node 123 has no error connection set, a c++ exception is raised, yet the python function returns an empty list.

This may be a consequence of the handling of floats, ints, booleans, and the normal error trapping and immediate reporting is broken. Basically, the next jupyter notebook cell executed will report the error that occurred in the prior cell.

Need to refresh my memory as to how to fix exactly, but should be easy.

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def _GetElementVarIdentifiers_native(simulation, elementId, size):
    return swift_so.GetElementVarIdentifiers(simulation, elementId, size)

is not decorated with @_s_wrap.check_exceptions. Why?

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Lots of the _native functions e.g. like def _GetRecordedVariableNames_native(simulation, size) do not have the decorator. Why? probably deliberate but I forget why.

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This should now be resolved. python Unit tests now pass; will check from notebooks the behavior. Otherwise, ready to close