Use branched logic to determine NYS itemization

We currently determine NYS itemization based on [whether itemized deductions exceed the standard deduction](https://github.com/PolicyEngine/policyengine-us/blob/master/policyengine_us/variables/gov/states/ny/tax/income/taxable_income/deductions/itemized/ny_itemizes.py)

However, since the [college tuition credit is only available to non-itemizers](https://github.com/PolicyEngine/policyengine-us/blob/master/policyengine_us/variables/gov/states/ny/tax/income/credits/ny_college_tuition_credit.py), I think we need a branched simulation to determine which minimizes tax liability