Fix get_test_executions_dml_sql timing #556

Job	Run time
integration (snowflake)	1m 50s
integration (bigquery)	3m 8s
integration (postgres)	1m 24s
single-run-different-versions (snowflake, 1_3_0)	1m 14s
single-run-different-versions (snowflake, 1_4_0)	1m 24s
single-run-different-versions (snowflake, 1_5_0)	1m 11s
single-run-different-versions (snowflake, 1_6_0)	1m 7s
single-run-different-versions (snowflake, 1_7_0)	1m 8s
single-run-different-versions (snowflake, 1_8_0)	1m 8s
single-run-different-versions (bigquery, 1_3_0)	1m 28s
single-run-different-versions (bigquery, 1_4_0)	2m 33s
single-run-different-versions (bigquery, 1_5_0)	1m 43s
single-run-different-versions (bigquery, 1_6_0)	1m 39s
single-run-different-versions (bigquery, 1_7_0)	1m 44s
single-run-different-versions (bigquery, 1_8_0)	2m 3s
single-run-different-versions (postgres, 1_3_0)	47s
single-run-different-versions (postgres, 1_4_0)	1m 5s
single-run-different-versions (postgres, 1_5_0)	50s
single-run-different-versions (postgres, 1_6_0)	55s
single-run-different-versions (postgres, 1_7_0)	56s
single-run-different-versions (postgres, 1_8_0)	55s
	30m 12s

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