[ConstraintSystem] Skip sendability check for static members

Such members only capture base metatatypes which are themselves
always sendable.

lib/Sema/ConstraintSystem.cpp

@@ -2806,7 +2806,9 @@ ConstraintSystem::getTypeOfMemberReference(
     FunctionType::ExtInfo info;
 
     if (Context.LangOpts.hasFeature(Feature::InferSendableFromCaptures)) {
-      if (isPartialApplication(locator) && baseOpenedTy->isSendableType()) {
+      if (isPartialApplication(locator) &&
+          (resolvedBaseTy->is<AnyMetatypeType>() ||
+           baseOpenedTy->isSendableType())) {
         // Add @Sendable to functions without conditional conformances
         functionType =
             functionType