cppgc: young-gen: Fix gcc build failure

Old gcc versions (< gcc-8) have problems with parameter packs in
capture-lists wrapped in fold-expressions.

Bug: chromium:1029379
Change-Id: I0c0ee7caa2d750f551e93fdfeb2667328bee4acb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3627594
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80356}

test/unittests/heap/cppgc/minor-gc-unittest.cc

@@ -109,9 +109,9 @@ TYPED_TEST_SUITE(MinorGCTestForType, ObjectTypes);
 namespace {
 template <typename... Args>
 void RunMinorGCAndExpectObjectsPromoted(MinorGCTest& test, Args*... args) {
-  ([args] { EXPECT_TRUE(IsHeapObjectYoung(args)); }(), ...);
+  EXPECT_TRUE((IsHeapObjectYoung(args) && ...));
   test.CollectMinor();
-  ([args] { EXPECT_TRUE(IsHeapObjectOld(args)); }(), ...);
+  EXPECT_TRUE((IsHeapObjectOld(args) && ...));
 }
 
 struct ExpectRememberedSlotsAdded final {