[test] Disable fast_c_api exposure on correctness fuzzing

This CL disables exposing the d8.test.fast_c_api constructor when
we're doing correctness fuzzing to prevent TypeError when the object
is not defined (which happens when --turbo-fast-api-calls is not
passed).

Bug: chromium:1196569
Change-Id: I39069c736d11326419b7562189931afc69a485b0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2808940Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73822}

src/d8/d8.cc

@@ -2722,7 +2722,11 @@ Local<ObjectTemplate> Shell::CreateD8Template(Isolate* isolate) {
     test_template->Set(
         isolate, "verifySourcePositions",
         FunctionTemplate::New(isolate, TestVerifySourcePositions));
-    if (i::FLAG_turbo_fast_api_calls) {
+    // Correctness fuzzing will attempt to compare results of tests with and
+    // without turbo_fast_api_calls, so we don't expose the fast_c_api
+    // constructor when --correctness_fuzzer_suppressions is on.
+    if (i::FLAG_turbo_fast_api_calls &&
+        !i::FLAG_correctness_fuzzer_suppressions) {
       test_template->Set(isolate, "fast_c_api",
                          Shell::CreateTestFastCApiTemplate(isolate));
     }