test(pyspark): enable `test_union_no_sort` `distinct=True` case
test(pyspark): enable `test_union_no_sort` `distinct=True` case

ibis-project/ibis,ibis-project/ibis,cpcloud/ibis,cpcloud/ibis,ibis-project/ibis,cpcloud/ibis,ibis-project/ibis,cpcloud/ibis