Change config for multicurveInitializer to scheduledMulticurveInitializer

[Cooper-Kunz]

Right now the sdk determines which version of the multicurve initializer you're attempting to use based on setting .withSchedule()

The multicurveInitializer (non-scheduled) version will be deprecated or discouraged.

So, the SDK should default to using the scheduled version of the contract. If .withSchedule() isn't set, it should be 0 or instantly launched.