Backward proto compatibility fix (#18752)

Author: evanevanevanevannnn

ydb/library/yql/providers/solomon/common/util.cpp

@@ -52,17 +52,15 @@ NProto::TDqSolomonSource FillSolomonSource(const TSolomonClusterConfig* config,
         source.SetProject(project);
     }
 
+    source.SetEndpoint(config->GetCluster()); // Backward compatibility
     source.SetHttpEndpoint(config->GetCluster());
+    source.SetGrpcEndpoint(config->GetCluster());
     for (const auto& attr : config->settings()) {
         if (attr.name() == "grpc_location"sv) {
             source.SetGrpcEndpoint(attr.value());
         }
     }
 
-    if (source.GetGrpcEndpoint().empty()) {
-        source.SetGrpcEndpoint(config->GetCluster());
-    }
-    
     return source;
 }
 

ydb/library/yql/providers/solomon/proto/dq_solomon_shard.proto

@@ -49,7 +49,7 @@ message TDownsampling {
 
 message TDqSolomonSource {
     ESolomonClusterType ClusterType = 1;
-    reserved 2;
+    string Endpoint = 2; // deprecated
     bool UseSsl = 3;
     string ServiceAccount = 4;
     TToken Token = 5;