### _Why are the changes needed?_
to close issue #4058 and help to close pr #3852.
When execute test `KyuubiOnKubernetesWithClientSparkTestsSuite` with `execute statement - select with variable substitution`, the initial method
`org.apache.kyuubi.operation.HiveJDBCTestHelper#withThriftClient` will overlook the connectionConf in `org.apache.kyuubi.operation.JDBCTestHelper#jdbcUrl`:
```
def withThriftClient[T](user: Option[String] = None)(f: TCLIService.Iface => T): T = {
TClientTestUtils.withThriftClient(
jdbcUrl.stripPrefix(URL_PREFIX).split("/;").head,
user)(f)`
}
```
Here we just aborted the tail of `jdbcUrl.stripPrefix(URL_PREFIX).split("/;")`, in which the connectionConfs are set.
In that case the `org.apache.kyuubi.kubernetes.test.deployment.KyuubiOnKubernetesWithClientSparkTestsSuite#connectionConf` was invalid actually.
### _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#4059 from xuefeimiaoao/branch-fix-connectionConf.
Closes#4058
a6395631 [xuefeimiaoao] [KYUUBI #4058] [IT][Test][K8S] Fix the missing of connectionConf of SparkQueryTests
Authored-by: xuefeimiaoao <1255072085@qq.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
bca43af01a