### _Why are the changes needed?_
Follow #5329 and close#5328:
1. Add new config `kyuubi.metadata.store.jdbc.priority.enabled` to control whether enable priority scheduling, due to users may experience performance issues when using MySQL5.7 as metastore backend and enabling kyuubi batch v2 priority feature.
2. When priority scheduling is enabled, `KyuubiBatchService` picks metadata job with `ORDER BY priority DESC, create_time ASC`.
3. Insert metadata with priority field, default priority value is `10`.
4. Add new config `kyuubi.batch.priority` for each batch priority.
### _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
- [ ] [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?_
No
Closes#5352 from zwangsheng/KYUUBI#5328.
Closes#5328
687ed1ed6 [Cheng Pan] Update kyuubi-server/src/main/scala/org/apache/kyuubi/server/metadata/jdbc/JDBCMetadataStore.scala
58621b557 [zwangsheng] fix comments
1bf81e75c [zwangsheng] fix style
7ed2551b3 [zwangsheng] update default priority desc & improve UT
21ceccb01 [zwangsheng] fix doc
27fc5e825 [zwangsheng] enrich desc
c0bbc0dfd [zwangsheng] fix style
6b8d0f091 [zwangsheng] fix comment
67eb2524d [zwangsheng] fix comment
e1705c34d [zwangsheng] Add config to control whether pick order by priority or not
129a46729 [zwangsheng] Add unit test for pickBatchForSubmitting
fcaf85d92 [zwangsheng] Fix unit test
f7ca2219e [zwangsheng] Fix unit test
8d4b276ff [wangsheng] fix code style
4c6b99090 [wangsheng] fix comments
654ad843a [zwangsheng] [KYUUBI #5328][V2] Kyuubi Server Pick Metadata job with priority
Lead-authored-by: zwangsheng <binjieyang@apache.org>
Co-authored-by: wangsheng <2213335496@qq.com>
Co-authored-by: Cheng Pan <pan3793@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
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