YT-23616: Add implementation of method for creating rpc client

commit_hash:5854a0271a0a2a26dc9891ff1502889edbf38a18

Author: hiddenpath

yt/cpp/mapreduce/client/client.h

@@ -507,9 +507,13 @@ class TClient
 
 ////////////////////////////////////////////////////////////////////////////////
 
+TClientContext CreateClientContext(
+    const TString& serverName,
+    const TCreateClientOptions& options);
+
 TClientPtr CreateClientImpl(
     const TString& serverName,
-    const TCreateClientOptions& options = TCreateClientOptions());
+    const TCreateClientOptions& options = {});
 
 ////////////////////////////////////////////////////////////////////////////////
 

yt/cpp/mapreduce/interface/client.h

@@ -572,16 +572,14 @@ class IClient
     virtual void Shutdown() = 0;
 };
 
-
 /// Create a client for particular MapReduce cluster.
 IClientPtr CreateClient(
     const TString& serverName,
-    const TCreateClientOptions& options = TCreateClientOptions());
-
+    const TCreateClientOptions& options = {});
 
 /// Create a client for mapreduce cluster specified in `YT_PROXY` environment variable.
 IClientPtr CreateClientFromEnv(
-    const TCreateClientOptions& options = TCreateClientOptions());
+    const TCreateClientOptions& options = {});
 
 ////////////////////////////////////////////////////////////////////////////////