### _Why are the changes needed?_
Fix https://github.com/apache/incubator-kyuubi/issues/3531
This pr aims to add documentation for Hive connector
### _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
- [ ] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#3532 from Yikf/hive-doc.
Closes#3531
e10a98b2 [yikf] Add documentation for Hive connector
Authored-by: yikf <yikaifei1@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>