julia

0a65af86 - `AbstractInterpreter`: set up `ForwardableArgtypes` interface (#47505)

`AbstractInterpreter`: set up `ForwardableArgtypes` interface (#47505) This interface is necessary for us to implement IPO-able customized external lattice implementation. Additionally `InferenceResult(::MethodInstance, ::SimpleArgtypes)` constructor may be useful for debugging const-prop' inference or implement something like #29261.