[AutoSparkUT] Add GPU test coverage for DataFrameTimeWindowingSuite (TimeWindow expression)

[wjxiz1992]

Coverage gap

Apache Spark 3.3.0 ships a 22-test DataFrameTimeWindowingSuite under spark/sql/core/src/test/scala/org/apache/spark/sql/DataFrameTimeWindowingSuite.scala that exercises the TimeWindow expression:

• Tumbling and sliding time windows with various durations (second / millisecond / minute)
• Time window SQL syntax with 1/2/3 string/duration expressions
• Window slide alignment (no filter when windowDuration is a multiple of slideDuration)
• Handling of negative start times
• TimestampNTZ type support (SPARK-36091)
• Nullability of window start / end fields (SPARK-38227)
• Window column projection, grouping, and aggregation

None of these behaviors are currently exercised against the RAPIDS GPU path in tests/src/test/spark330/scala/org/apache/spark/sql/rapids/suites/. The existing RapidsTimeWindowSuite in RAPIDS only covers expression-level evaluation (via ExpressionEvalHelper), not the end-to-end DataFrame / SQL flow.

Intended test scope

Add RapidsDataFrameTimeWindowingSuite extends DataFrameTimeWindowingSuite with RapidsSQLTestsTrait, register it in RapidsTestSettings.

Expected outcome

All 22 tests pass on the GPU path (confirmed locally; see PR). No exclusions required.