chore: Reenable nested types for CometFuzzTestSuite with int96 (#1761)

Author: mbutrovich

docs/source/user-guide/compatibility.md

@@ -62,7 +62,6 @@ logical types. Arrow-based readers, such as DataFusion and Comet do respect thes
 rather than signed. By default, Comet will fall back to Spark when scanning Parquet files containing `byte` or `short`
 types (regardless of the logical type). This behavior can be disabled by setting
 `spark.comet.scan.allowIncompatible=true`.
-- Reading legacy INT96 timestamps contained within complex types can produce different results to Spark
 - There is a known performance issue when pushing filters down to Parquet. See the [Comet Tuning Guide] for more
 information.
 - There are failures in the Spark SQL test suite when enabling these new scans (tracking issues: [#1542] and [#1545]).

docs/templates/compatibility-template.md

@@ -62,7 +62,6 @@ The new scans currently have the following limitations:
   rather than signed. By default, Comet will fall back to Spark when scanning Parquet files containing `byte` or `short`
   types (regardless of the logical type). This behavior can be disabled by setting
   `spark.comet.scan.allowIncompatible=true`.
-- Reading legacy INT96 timestamps contained within complex types can produce different results to Spark
 - There is a known performance issue when pushing filters down to Parquet. See the [Comet Tuning Guide] for more
   information.
 - There are failures in the Spark SQL test suite when enabling these new scans (tracking issues: [#1542] and [#1545]).

spark/src/test/scala/org/apache/comet/CometFuzzTestSuite.scala

@@ -247,12 +247,7 @@ class CometFuzzTestSuite extends CometTestBase with AdaptiveSparkPlanHelper {
   }
 
   test("Parquet temporal types written as INT96") {
-    // int96 coercion in DF does not work with nested types yet
-    // https://github.com/apache/datafusion/issues/15763
-    testParquetTemporalTypes(
-      ParquetOutputTimestampType.INT96,
-      generateArray = false,
-      generateStruct = false)
+    testParquetTemporalTypes(ParquetOutputTimestampType.INT96)
   }
 
   test("Parquet temporal types written as TIMESTAMP_MICROS") {