feat: update go-redis to v8, support ctx in redis methods (#1507)

* feat: update go-redis to v8, support ctx in redis methods

* fix compile errors

* chore: remove unused const

* chore: add tracing log on redis

core/stores/redis/redistest/redistest.go

@@ -17,10 +17,12 @@ func CreateRedis() (r *redis.Redis, clean func(), err error) {
 
 	return redis.New(mr.Addr()), func() {
 		ch := make(chan lang.PlaceholderType)
+
 		go func() {
 			mr.Close()
 			close(ch)
 		}()
+
 		select {
 		case <-ch:
 		case <-time.After(time.Second):