ignore typed errors correctly in list cache layer (#10879)

bonus write bucket metadata cache with enough quorum

Possible fix for #10868

cmd/metacache-stream.go

@@ -19,13 +19,13 @@ package cmd
 import (
 	"bytes"
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"strings"
 	"sync"
 
+	jsoniter "github.com/json-iterator/go"
 	"github.com/klauspost/compress/s2"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/tinylib/msgp/msgp"
@@ -816,6 +816,7 @@ type metacacheBlock struct {
 }
 
 func (b metacacheBlock) headerKV() map[string]string {
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
 	v, err := json.Marshal(b)
 	if err != nil {
 		logger.LogIf(context.Background(), err) // Unlikely