Modified updateUserNotifyProps to directly update the field (#18097)

* Modified updateUserNotifyProps to directly update the field

The method was only being used during import and it unnecessarily
made multiple queries to the DB.

Changed to a separate query that just updated the props field.

https://community-daily.mattermost.com/plugins/focalboard/workspace/zyoahc9uapdn3xdptac6jb69ic?id=285b80a3-257d-41f6-8cf4-ed80ca9d92e5&v=495cdb4d-c13a-4992-8eb9-80cfee2819a4&c=e4f9a891-85d6-4886-8590-1e327f7f8b8f

```release-note
NONE
```

* invalidating cache

```release-note
NONE
```

store/retrylayer/retrylayer.go

@@ -11610,6 +11610,26 @@ func (s *RetryLayerUserStore) UpdateMfaSecret(userID string, secret string) erro
 
 }
 
+func (s *RetryLayerUserStore) UpdateNotifyProps(userID string, props map[string]string) error {
+
+	tries := 0
+	for {
+		err := s.UserStore.UpdateNotifyProps(userID, props)
+		if err == nil {
+			return nil
+		}
+		if !isRepeatableError(err) {
+			return err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return err
+		}
+	}
+
+}
+
 func (s *RetryLayerUserStore) UpdatePassword(userID string, newPassword string) error {
 
 	tries := 0