fix build and tests canonization after merge

Author: adameat

ydb/core/util/cpuinfo.cpp

@@ -8,6 +8,7 @@
 #include <util/string/ascii.h>
 #include <util/string/builder.h>
 #include <util/system/info.h>
+#include <sstream>
 
 size_t NKikimr::RealNumberOfCpus() {
     // copy-pasted from util/system/info.cpp

ydb/core/viewer/json_pipe_req.cpp

@@ -804,8 +804,7 @@ TViewerPipeClient::TRequestResponse<NSchemeShard::TEvSchemeShard::TEvDescribeSch
     request->Record.SetSchemeshardId(schemeShardId);
     request->Record.SetPath(path);
     request->Record.MutableOptions()->CopyFrom(options);
-    auto pipe = ConnectTabletPipe(schemeShardId);
-    auto response = MakeRequestToPipe<NSchemeShard::TEvSchemeShard::TEvDescribeSchemeResult>(pipe, request.release(), cookie);
+    auto response = MakeRequestToTablet<NSchemeShard::TEvSchemeShard::TEvDescribeSchemeResult>(schemeShardId, request.release(), cookie);
     if (response.Span) {
         response.Span.Attribute("path", path);
     }