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### _Why are the changes needed?_
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Current connection number is already had. I add current operation number.
### _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.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1485 from zhenjiaguo/add-operation-number.
Closes#1393
beccdfed [zhenjiaguo] when cancel we need decCount the open operation
773d01ee [zhenjiaguo] when cancel we need decCount the open operation
59001995 [zhenjiaguo] change variable name
83f64fb8 [zhenjiaguo] unify operation metric
daf0b6a7 [zhenjiaguo] add operation number
Authored-by: zhenjiaguo <zhenjia_guo@163.com>
Signed-off-by: Kent Yao <yao@apache.org>
7beee52448