YT-23645: Do not override user configuration of logger

commit_hash:a4522facabf7d730438dfc794abddedb0838d79e

Author: hiddenpath

yt/cpp/mapreduce/client/init.cpp

@@ -180,12 +180,15 @@ void CommonInitialize(TGuard<TMutex>& g)
     auto logPath = TConfig::Get()->LogPath;
     if (logPath.empty()) {
         if (TConfig::Get()->LogUseCore) {
+            SetUseCoreLog();
+            if (!NLogging::TLogManager::Get()->IsDefaultConfigured()) {
+                return;
+            }
             auto coreLoggingConfig = NLogging::TLogManagerConfig::CreateStderrLogger(ToCoreLogLevel(logLevel));
             for (const auto& rule : coreLoggingConfig->Rules) {
                 rule->ExcludeCategories = TConfig::Get()->LogExcludeCategories;
             }
             NLogging::TLogManager::Get()->Configure(coreLoggingConfig);
-            SetUseCoreLog();
         } else {
             auto logger = CreateStdErrLogger(logLevel);
             SetLogger(logger);