fix(makefile): fix Makefile install don't install discovery folder (#6158)

Author: leslie-tsang

Makefile

@@ -274,6 +274,11 @@ install: runtime
 
 	$(ENV_INSTALL) -d $(ENV_INST_LUADIR)/apisix/discovery
 	$(ENV_INSTALL) apisix/discovery/*.lua $(ENV_INST_LUADIR)/apisix/discovery/
+	$(ENV_INSTALL) -d $(ENV_INST_LUADIR)/apisix/discovery/{consul_kv,dns,eureka,nacos}
+	$(ENV_INSTALL) apisix/discovery/consul_kv/*.lua $(ENV_INST_LUADIR)/apisix/discovery/consul_kv
+	$(ENV_INSTALL) apisix/discovery/dns/*.lua $(ENV_INST_LUADIR)/apisix/discovery/dns
+	$(ENV_INSTALL) apisix/discovery/eureka/*.lua $(ENV_INST_LUADIR)/apisix/discovery/eureka
+	$(ENV_INSTALL) apisix/discovery/nacos/*.lua $(ENV_INST_LUADIR)/apisix/discovery/nacos
 
 	$(ENV_INSTALL) -d $(ENV_INST_LUADIR)/apisix/http
 	$(ENV_INSTALL) apisix/http/*.lua $(ENV_INST_LUADIR)/apisix/http/