[KYUUBI #575] [TEST] [DEPS] Pin scala-reflect to avoid potential conflicts

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### _Why are the changes needed?_
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There is transitive dependency `scala-reflect` 2.12.13 from `scalatest` in test scope, we'd better to pin version align with `scala-library` to avoid potential conflicts.

### _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/latest/tools/testing.html#running-tests) locally before make a pull request

Closes #575 from pan3793/scala-reflect.

Closes #575

b6019f7 [Cheng Pan] [TEST] [DEPS] Pin scala-reflect to avoid potential conflicts

Authored-by: Cheng Pan <379377944@qq.com>
Signed-off-by: Kent Yao <yao@apache.org>

pom.xml

@@ -210,6 +210,12 @@
                 <version>${scala.version}</version>
             </dependency>
 
+            <dependency>
+                <groupId>org.scala-lang</groupId>
+                <artifactId>scala-reflect</artifactId>
+                <version>${scala.version}</version>
+            </dependency>
+
             <dependency>
                 <groupId>org.apache.hadoop</groupId>
                 <artifactId>hadoop-client-api</artifactId>