### _Why are the changes needed?_
Replace `mirror-cn` profile with Apache officially suggested dlcdn.
mirror-cn is only suite for CN, while dlcdn is much wiser.
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1970 from yaooqinn/cdn.
Closes#1970
a325f828 [Kent Yao] Repalce mirror-cn profile with Apache officially suggested dlcdn
a0756b4f [Kent Yao] Repalce mirror-cn profile with Apache officially suggested dlcdn
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: Kent Yao <yao@apache.org>