Use hasAppliedSelf in getFunctionArgApplyInfo

`callee->hasCurriedSelf()` isn't the correct check
here when we have an argument mismatch for the
self parameter in a curried application.

lib/Sema/ConstraintSystem.cpp

@@ -3043,6 +3043,22 @@ bool constraints::isAutoClosureArgument(Expr *argExpr) {
   return false;
 }
 
+bool constraints::hasAppliedSelf(ConstraintSystem &cs,
+                                 const OverloadChoice &choice) {
+  auto *decl = choice.getDeclOrNull();
+  if (!decl)
+    return false;
+
+  auto baseType = choice.getBaseType();
+  if (baseType)
+    baseType = cs.getFixedTypeRecursive(baseType, /*wantRValue=*/true);
+
+  // In most cases where we reference a declaration with a curried self
+  // parameter, it gets dropped from the type of the reference.
+  return decl->hasCurriedSelf() &&
+         doesMemberRefApplyCurriedSelf(baseType, decl);
+}
+
 bool constraints::conformsToKnownProtocol(ConstraintSystem &cs, Type type,
                                           KnownProtocolKind protocol) {
   if (auto *proto = cs.TC.getProtocol(SourceLoc(), protocol))