test: enable SPARK-32509 DPP test for Spark 4.0

[andygrove]

Which issue does this PR close?

Partially addresses #4045.

Rationale for this change

The SPARK-32509 test in DynamicPartitionPruningSuite was disabled across all Spark versions under issue #4045. Re-running it on Spark 4.0.1 with Comet enabled now passes in all 6 concrete suite variants (V1/V2/V2Filter × AEOff/AEOn).

What changes are included in this PR?

Removes the IgnoreComet annotation from the SPARK-32509 test in dev/diffs/4.0.1.diff. The companion SPARK-34637 test referenced by the same IgnoreComet annotation remains ignored under #4045 since it still fails on Spark 4.0.1 with AQE enabled.

The test was checked on Spark 3.5.8 as well but still fails there in DynamicPartitionPruningV1SuiteAEOn, so the change is scoped to Spark 4.0 only.

How are these changes tested?

Locally ran the test against the patched Spark 4.0.1 source with ENABLE_COMET=true ENABLE_COMET_ONHEAP=true:

sql/testOnly org.apache.spark.sql.DynamicPartitionPruningV1SuiteAEOff \
             org.apache.spark.sql.DynamicPartitionPruningV1SuiteAEOn \
             org.apache.spark.sql.DynamicPartitionPruningV2SuiteAEOff \
             org.apache.spark.sql.DynamicPartitionPruningV2SuiteAEOn \
             org.apache.spark.sql.DynamicPartitionPruningV2FilterSuiteAEOff \
             org.apache.spark.sql.DynamicPartitionPruningV2FilterSuiteAEOn \
  -- -z "SPARK-32509"

All 6 variants pass.