[compiler-dispatcher] Fix double ShouldYield call

Fixed: v8:12886
Change-Id: I729f6f11be3befa573ac6a201dc91e3d5f2eebc1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652791
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80658}

src/compiler-dispatcher/lazy-compile-dispatcher.cc

@@ -407,7 +407,10 @@ void LazyCompileDispatcher::DoBackgroundWork(JobDelegate* delegate) {
 
   ReusableUnoptimizedCompileState reusable_state(&isolate);
 
-  while (!delegate->ShouldYield()) {
+  while (true) {
+    // Return immediately on yield, avoiding the second loop.
+    if (delegate->ShouldYield()) return;
+
     Job* job = nullptr;
     {
       base::MutexGuard lock(&mutex_);