fix: enable ArrayContains allowIncompatible for map_contains_key test

map_contains_key is internally rewritten by Spark to use ArrayContains,
so it needs the allowIncompatible config to run natively.

Author: andygrove

spark/src/test/resources/sql-tests/expressions/map/map_contains_key.sql

@@ -15,6 +15,7 @@
 -- specific language governing permissions and limitations
 -- under the License.
 
+-- Config: spark.comet.expression.ArrayContains.allowIncompatible=true
 -- ConfigMatrix: parquet.enable.dictionary=false,true
 
 -- TODO: replace map_from_arrays with map whenever map is supported in Comet