feat: add middlewares config for rest (#2765)

* feat: add middlewares config for rest

* chore: disable logs in tests

* chore: enable verbose in tests

rest/handler/maxconnshandler.go

@@ -8,8 +8,8 @@ import (
 	"github.com/zeromicro/go-zero/rest/internal"
 )
 
-// MaxConns returns a middleware that limit the concurrent connections.
-func MaxConns(n int) func(http.Handler) http.Handler {
+// MaxConnsHandler returns a middleware that limit the concurrent connections.
+func MaxConnsHandler(n int) func(http.Handler) http.Handler {
 	if n <= 0 {
 		return func(next http.Handler) http.Handler {
 			return next