swift

88150610 - [IRGen] Simplify nondependent associated type witness metadata accessors.

[IRGen] Simplify nondependent associated type witness metadata accessors. When we’re creating an associated type witness metadata accessor for resilience reasons, but the associated type witness doesn’t involve any type parameters, directly form the type metadata reference (and don’t cache it). While here… update all of the IRGen/SILGen test cases perturbed by the introduction of resilient associated type access patterns.