### _Why are the changes needed?_
Close#5381
change default metrics reporter to prometheus since Kyuubi 1.8
### _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.readthedocs.io/en/master/contributing/code/testing.html#running-tests) locally before make a pull request
### _Was this patch authored or co-authored using generative AI tooling?_
Closes#5344 from zhaohehuhu/Improvement-0928.
Closes#5381
84f4c8208 [hezhao2] reset METRICS_REPORTERS for test case
b9ee5f711 [Cheng Pan] Update kyuubi-server/src/test/scala/org/apache/kyuubi/events/handler/ServerJsonLoggingEventHandlerSuite.scala
86165a6fe [Cheng Pan] Update kyuubi-server/src/test/scala/org/apache/kyuubi/events/handler/ServerJsonLoggingEventHandlerSuite.scala
a3605b626 [hezhao2] set METRICS_PROMETHEUS_PORT to 0 for test cases
f1a4d2861 [hezhao2] restore version number for kyuubi.metrics.reporters in doc
dae40e1a2 [hezhao2] change default metrics reporter to prometheus
Lead-authored-by: hezhao2 <hezhao2@cisco.com>
Co-authored-by: Cheng Pan <pan3793@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
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