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### _Why are the changes needed?_
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Support incremental collection, [SPARK-25224](https://issues.apache.org/jira/browse/SPARK-25224)
Introduce new conf: `kyuubi.operation.incremental.collect`
### _How was this patch tested?_
- [x] 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.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1198 from pan3793/inc-col.
Closes#1198
946068e9 [Cheng Pan] Address comments
2798d0d8 [Cheng Pan] Correct conf doc
3720fd41 [Cheng Pan] Incremental collection
Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
b1b7f25faf