Fetch of strategy configuration will fail when working with non default IRs

[miguelmtzinf]

ReserveInterestRateStrategy contracts based on IReserveInterestRateStrategy will not work with the current ListingEngine, because will try to fetch data from functions that are part of IDefaultInterestRateStrategy.

https://github.com/bgd-labs/aave-helpers/blob/0a774604ebf4019a9dc44768e2085a1ea053d6db/src/ProtocolV3TestBase.sol#L285