chore: Remove invalid `spark.sql.optimizer.constantFolding.enabled` configuration from java benchmarks.

[wForget]

spark.sql.optimizer.constantFolding.enabled seems not to be a valid spark configuration.

datafusion-comet/spark/src/test/scala/org/apache/spark/sql/benchmark/CometBenchmarkBase.scala

Line 127 in 95be2c3

"spark.sql.optimizer.constantFolding.enabled" -> "false") ++ extraCometConfigs

Does this mean it should be configured as: spark.sql.optimizer.excludedRules=org.apache.spark.sql.catalyst.optimizer.ConstantFolding?

[wForget]

@andygrove, could you please help verify this?