New concurrent flow view

commit_hash:320906aa75e48bd6c568ac227aafaa1091dbb647

Author: mikari

yt/yt/client/api/flow_client.h

@@ -75,7 +75,9 @@ struct TSetPipelineDynamicSpecResult
 
 struct TGetFlowViewOptions
     : public TTimeoutOptions
-{ };
+{
+    bool Cache = true;
+};
 
 struct TGetFlowViewResult
 {

yt/yt/client/api/rpc_proxy/client_impl.cpp

@@ -2728,6 +2728,7 @@ TFuture<TGetFlowViewResult> TClient::GetFlowView(
 
     req->set_pipeline_path(pipelinePath);
     req->set_view_path(viewPath);
+    req->set_cache(options.Cache);
 
     return req->Invoke().Apply(BIND([] (const TApiServiceProxy::TRspGetFlowViewPtr& rsp) {
         return TGetFlowViewResult{

yt/yt/client/driver/flow_commands.cpp

@@ -332,6 +332,13 @@ void TGetFlowViewCommand::Register(TRegistrar registrar)
 {
     registrar.Parameter("view_path", &TThis::ViewPath)
         .Default();
+
+     registrar.ParameterWithUniversalAccessor<bool>(
+        "cache",
+        [] (TThis* command) -> auto& {
+            return command->Options.Cache;
+        })
+        .Optional(/*init*/ false);
 }
 
 void TGetFlowViewCommand::DoExecute(ICommandContextPtr context)

yt/yt_proto/yt/client/api/rpc_proxy/proto/api_service.proto

@@ -3018,6 +3018,7 @@ message TReqGetFlowView
 {
     required bytes pipeline_path = 1; // YPath
     optional bytes view_path = 2; // YPath
+    optional bool cache = 3 [default = true];
 }
 
 message TRspGetFlowView