OpenFermion estimator gives incorrect results for Litinski factories

[max-radin]

The openfermion_estimator can give incorrect resource estimates when using Litinski factories, e.g.magic_state_factory_iterator=iter_litinski_factories(...). It assumes that one distillation is required for each Toffoli gate and one for every two T gates (see here). This is true for AutoCCZ factories, but not for the Litinski factories. The OpenFermion estimator should be updated to correctly determine the number of distillations required.