Use accessible get/set arguments for collection element receiver

When generating collection element receiver (such as 'a[i]'), accessible
descriptor for get/set operator should be used.
Otherwise, if the corresponding get/set operator fun is called via an
accessor, its argument types may be different in case of generic fun
specialized with primitive types.

 #KT-20387 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -3914,7 +3914,9 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
 
             boolean isGetter = OperatorNameConventions.GET.equals(operationDescriptor.getName());
 
-            Callable callable = resolveToCallable(operationDescriptor, false, isGetter ? resolvedGetCall : resolvedSetCall);
+            ResolvedCall<FunctionDescriptor> resolvedCall = isGetter ? resolvedGetCall : resolvedSetCall;
+            assert resolvedCall != null : "No resolved call for " + operationDescriptor;
+            Callable callable = resolveToCallable(accessibleFunctionDescriptor(resolvedCall), false, resolvedCall);
             Callable callableMethod = resolveToCallableMethod(operationDescriptor, false);
             Type[] argumentTypes = callableMethod.getParameterTypes();