YQ fixed fqrun start without queries (#18607)

Author: GrigoriyPA

ydb/tests/tools/fqrun/fqrun.cpp

@@ -466,7 +466,6 @@ class TMain : public TMainBase {
         });
         options.AddLongOption('A', "action", "Query execute action")
             .RequiredArgument("action")
-            .DefaultValue("run")
             .Choices(queryAction.GetChoices())
             .Handler1([this, queryAction](const NLastGetopt::TOptsParser* option) {
                 TString choice(option->CurValOrDef());