Fix output_rows_skew sqllogictest flake

Author: geoffreyclaude

datafusion/sqllogictest/test_files/explain_analyze.slt

@@ -48,6 +48,7 @@ STORED AS PARQUET;
 statement ok
 CREATE EXTERNAL TABLE skew_parquet
 STORED AS PARQUET
+WITH ORDER (x)
 LOCATION 'test_files/scratch/explain_analyze/output_rows_skew';
 
 # All partition's output_rows: [4]
@@ -70,6 +71,7 @@ STORED AS PARQUET;
 statement ok
 CREATE EXTERNAL TABLE skew_parquet
 STORED AS PARQUET
+WITH ORDER (x)
 LOCATION 'test_files/scratch/explain_analyze/output_rows_skew';
 
 query TT
@@ -98,6 +100,7 @@ STORED AS PARQUET;
 statement ok
 CREATE EXTERNAL TABLE skew_parquet
 STORED AS PARQUET
+WITH ORDER (x)
 LOCATION 'test_files/scratch/explain_analyze/output_rows_skew';
 
 query TT
@@ -109,6 +112,7 @@ Plan with Metrics DataSourceExec: <slt:ignore>output_rows_skew=84.31%<slt:ignore
 statement ok
 CREATE EXTERNAL TABLE skew_parquet_single
 STORED AS PARQUET
+WITH ORDER (x)
 LOCATION 'test_files/scratch/explain_analyze/output_rows_skew/f4.parquet';
 
 query TT