### _Why are the changes needed?_
### _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#2395 from yaooqinn/doc2.
Closes#2395
109440bf [Kent Yao] [DOC] Add Documentation for Spark AuthZ Extension
852e7fd5 [Kent Yao] [DOC] Add Documentation for Spark AuthZ Extension
dfeef884 [Kent Yao] [DOC] Add Documentation for Spark AuthZ Extension
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: ulysses-you <ulyssesyou@apache.org>