### _Why are the changes needed?_
Support SSL for Etcd
### _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#3105 from hddong/support-etcd-ssl.
Closes#3104
49aadb9c [hongdongdong] change enable to enabled
87fa6269 [hongdongdong] [KYUUBI #3104] Support SSL for Etcd
Authored-by: hongdongdong <hongdongdong@cmss.chinamobile.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>