[Turboprop] Disable Node Splitting in Tubroprop scheduler.

Effect control linearization already does splitting on most constant nodes it
introduces, and we don't get much benifit otherwise for what is a fairly

BUG=v8:9684

Change-Id: I74301058d157cc163762722576f9301088f8e72a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2874460Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74383}

src/codegen/optimized-compilation-info.cc

@@ -99,11 +99,11 @@ void OptimizedCompilationInfo::ConfigureFlags() {
       if (FLAG_function_context_specialization) {
         set_function_context_specializing();
       }
+      if (FLAG_turbo_splitting) set_splitting();
       V8_FALLTHROUGH;
     case CodeKind::TURBOPROP:
       set_called_with_code_start_register();
       set_switch_jump_table();
-      if (FLAG_turbo_splitting) set_splitting();
       if (FLAG_untrusted_code_mitigations) set_poison_register_arguments();
       // TODO(yangguo): Disable this in case of debugging for crbug.com/826613
       if (FLAG_analyze_environment_liveness) set_analyze_environment_liveness();