Exclude tmp from backup/replication (#25736)

Author: nikvas0

ydb/core/grpc_services/rpc_export.cpp

@@ -294,6 +294,7 @@ class TExportRPC: public TRpcOperationRequestActor<TDerived, TEvRequest, true>,
                         // Skip children that we don't want to export
                         if (child.Name.StartsWith("~")
                             || child.Name.StartsWith(".sys")
+                            || child.Name.StartsWith(".tmp")
                             || child.Name.StartsWith(".metadata")
                             || child.Name.StartsWith("export-"))
                         {

ydb/core/tx/replication/controller/target_discoverer.cpp

@@ -241,6 +241,7 @@ class TTargetDiscoverer: public TActorBootstrapped<TTargetDiscoverer> {
 
         return entry.Name.starts_with("~")
             || entry.Name.starts_with(".sys")
+            || entry.Name.starts_with(".tmp")
             || entry.Name.starts_with(".metadata")
             || entry.Name.starts_with("export-");
     }