Prevent AI nodegraph from becoming corrupt on round reset (#1832)

Author: DESTROYGIRL

src/game/shared/neo/neo_gamerules.cpp

@@ -447,6 +447,10 @@ static const char *s_NeoPreserveEnts[] =
 {
 	"neo_gamerules",
 	"neo_game_config",
+	"info_hint",
+	"info_node_air",
+	"info_node_air_hint",
+	"info_node_climb",
 	"info_player_attacker",
 	"info_player_defender",
 	"info_player_start",