feat(server/v2,upgrade): add skip upgrade flag (#22682)

server/v2/flags.go

@@ -10,8 +10,9 @@ func prefix(f string) string {
 }
 
 var (
-	FlagMinGasPrices = prefix("minimum-gas-prices")
-	FlagCPUProfiling = prefix("cpu-profile")
+	FlagMinGasPrices       = prefix("minimum-gas-prices")
+	FlagCPUProfiling       = prefix("cpu-profile")
+	FlagUnsafeSkipUpgrades = prefix("unsafe-skip-upgrades")
 )
 
 const (

server/v2/server.go

@@ -184,6 +184,7 @@ func (s *Server[T]) StartCmdFlags() *pflag.FlagSet {
 	flags := pflag.NewFlagSet(s.Name(), pflag.ExitOnError)
 	flags.String(FlagMinGasPrices, "", "Minimum gas prices to accept for transactions; Any fee in a tx must meet this minimum (e.g. 0.01photino;0.0001stake)")
 	flags.String(FlagCPUProfiling, "", "Enable CPU profiling and write to the specified file")
+	flags.IntSlice(FlagUnsafeSkipUpgrades, []int{}, "Skip a set of upgrade heights to continue the old binary")
 
 	return flags
 }