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### _Why are the changes needed?_
Set/Reset operations are crucial for tunning Flink SQL jobs and enabling/disabling features, but they're not executed as SQL statements in Flink, thus can't be supported by the current ExecuteStatement implementation. We should extend ExecuteStatement to support these operations.
This is a sub-task of KPIP-2 #1322.
### _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.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1822 from link3280/feature/KYUUBI-1778.
Closes#1778
80b2de0a [Paul Lin] [KYUUBI #1825] Return key-value properties in two separate columns
786f3c58 [Paul Lin] [KYUUBI #1778] Support Flink reset operations
6513a317 [Paul Lin] [KYUUBI #1778] Support Flink set operations
Authored-by: Paul Lin <paullin3280@gmail.com>
Signed-off-by: Kent Yao <yao@apache.org>
ef8de3723e