[Gpr_To_Absl_Logging][Noise_Reduction]

Use GRPC_TRACE_LOG instead of LOG(INFO) in WorkStealingThreadPoolImpl::PrepareFork

This is to avoid spamming the logs with this message.

PiperOrigin-RevId: 652407193

src/core/lib/event_engine/thread_pool/work_stealing_thread_pool.cc

@@ -317,7 +317,8 @@ bool WorkStealingThreadPool::WorkStealingThreadPoolImpl::IsQuiesced() {
 }
 
 void WorkStealingThreadPool::WorkStealingThreadPoolImpl::PrepareFork() {
-  LOG(INFO) << "WorkStealingThreadPoolImpl::PrepareFork";
+  GRPC_TRACE_LOG(event_engine, INFO)
+      << "WorkStealingThreadPoolImpl::PrepareFork";
   SetForking(true);
   work_signal_.SignalAll();
   auto threads_were_shut_down = living_thread_count_.BlockUntilThreadCount(