[builtins] Improve kIteratorSymbolNonCallable error message

Bug: v8:12918
Change-Id: Id3419cf7cef833cc8e18948874c40e13a3f20675
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3798522
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82150}

src/common/message-template.h

@@ -120,7 +120,8 @@ namespace internal {
   T(InvalidUnit, "Invalid unit argument for %() '%'")                          \
   T(IterableYieldedNonString, "Iterable yielded % which is not a string")      \
   T(IteratorResultNotAnObject, "Iterator result % is not an object")           \
-  T(IteratorSymbolNonCallable, "Found non-callable @@iterator")                \
+  T(IteratorSymbolNonCallable,                                                 \
+    "Spread syntax requires ...iterable[Symbol.iterator] to be a function")    \
   T(IteratorValueNotAnObject, "Iterator value % is not an entry object")       \
   T(LanguageID, "Language ID should be string or object.")                     \
   T(LocaleNotEmpty,                                                            \

test/message/fail/spread-call-4.out

-*%(basename)s:5: TypeError: Found non-callable @@iterator
+*%(basename)s:5: TypeError: Spread syntax requires ...iterable[Symbol.iterator] to be a function
 console.log(1, ...x);
                   ^
-TypeError: Found non-callable @@iterator
+TypeError: Spread syntax requires ...iterable[Symbol.iterator] to be a function
     at *%(basename)s:5:9