occursCount that is greater than maxOccursBounds causes PE/UE rather than SDE

Currently, if you have an expression for occursCount, and that expression results in a value greater than maxOccursBounds (which defaults to 1024), then we currently throw a PE/UE. When parsing, this can result in backtracking for a non-obvious reason. The fact that maxOccursBounds was exceeded may not even be reported.

Instead, it seems like this should instead be a SDE so that the error is reported immediately and the user can either modify a tunable to increase the maxOccursBOunds, or rework the schema to not need such a large array.