[SPARK-40876][SQL][TESTS][FOLLOW-UP] Remove invalid decimal test case when ANSI mode is on

### What changes were proposed in this pull request?

This PR is a followup of apache#44513 that excludes `Decimal(5, 4)` for `10.34` that cannot be represented with ANSI mode on.

### Why are the changes needed?

ANSI build is broken (https://github.com/apache/spark/actions/runs/7455394893/job/20284415710):

```
org.apache.spark.SparkArithmeticException: [NUMERIC_VALUE_OUT_OF_RANGE] 10.34 cannot be represented as Decimal(5, 4). If necessary set "spark.sql.ansi.enabled" to "false" to bypass this error, and return NULL instead. SQLSTATE: 22003
== DataFrame ==
"cast" was called from
org.apache.spark.sql.execution.datasources.parquet.ParquetTypeWideningSuite.writeParquetFiles(ParquetTypeWideningSuite.scala:113)

	at org.apache.spark.sql.errors.QueryExecutionErrors$.cannotChangeDecimalPrecisionError(QueryExecutionErrors.scala:116)
	at org.apache.spark.sql.errors.QueryExecutionErrors.cannotChangeDecimalPrecisionError(QueryExecutionErrors.scala)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown Source)
```

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Existing test cases should cover.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes apache#44632 from HyukjinKwon/SPARK-40876-followup.

Lead-authored-by: Hyukjin Kwon <[email protected]>
Co-authored-by: Hyukjin Kwon <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: HyukjinKwon

sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTypeWideningSuite.scala

@@ -226,9 +226,9 @@ class ParquetTypeWideningSuite
       Seq((7, 4) -> (5, 2), (10, 7) -> (5, 2), (20, 17) -> (5, 2), (12, 4) -> (10, 2),
         (20, 17) -> (10, 2), (22, 4) -> (20, 2)) ++
       // Increasing precision and decreasing scale.
-      Seq((5, 4) -> (7, 2), (10, 6) -> (12, 4), (20, 7) -> (22, 5)) ++
+      Seq((10, 6) -> (12, 4), (20, 7) -> (22, 5)) ++
       // Decreasing precision and increasing scale.
-      Seq((7, 2) -> (5, 4), (12, 4) -> (10, 6), (22, 5) -> (20, 7)) ++
+      Seq((12, 4) -> (10, 6), (22, 5) -> (20, 7)) ++
       // Increasing precision by a smaller amount than scale.
       Seq((5, 2) -> (6, 4), (10, 4) -> (12, 7), (20, 5) -> (22, 8))
   }