[SPARK-28201][SQL][TEST][FOLLOWUP] Fix Integration test suite according to the new exception message

## What changes were proposed in this pull request?

apache#25010 breaks the integration test suite due to the changing the user-facing exception like the following. This PR fixes the integration test suite.

```scala
-    require(
-      decimalVal.precision <= precision,
-      s"Decimal precision ${decimalVal.precision} exceeds max precision $precision")
+    if (decimalVal.precision > precision) {
+      throw new ArithmeticException(
+        s"Decimal precision ${decimalVal.precision} exceeds max precision $precision")
+    }
```

## How was this patch tested?

Manual test.
```
$ build/mvn install -DskipTests
$ build/mvn -Pdocker-integration-tests -pl :spark-docker-integration-tests_2.12 test
```

Closes apache#25165 from dongjoon-hyun/SPARK-28201.

Authored-by: Dongjoon Hyun <dhyun@apple.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>

Author: dongjoon-hyun

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/OracleIntegrationSuite.scala

@@ -376,8 +376,8 @@ class OracleIntegrationSuite extends DockerJDBCIntegrationSuite with SharedSQLCo
     val e = intercept[org.apache.spark.SparkException] {
       spark.read.jdbc(jdbcUrl, "tableWithCustomSchema", new Properties()).collect()
     }
-    assert(e.getMessage.contains(
-      "requirement failed: Decimal precision 39 exceeds max precision 38"))
+    assert(e.getCause().isInstanceOf[ArithmeticException])
+    assert(e.getMessage.contains("Decimal precision 39 exceeds max precision 38"))
 
     // custom schema can read data
     val props = new Properties()