[FIX] Modify Snowflake parse_json macro usage #560

Job	Run time
integration (snowflake)	2m 4s
integration (bigquery)	2m 44s
integration (postgres)	1m 28s
single-run-different-versions (snowflake, 1_3_0)	1m 27s
single-run-different-versions (snowflake, 1_4_0)	1m 31s
single-run-different-versions (snowflake, 1_5_0)	1m 27s
single-run-different-versions (snowflake, 1_6_0)	1m 27s
single-run-different-versions (snowflake, 1_7_0)	1m 28s
single-run-different-versions (snowflake, 1_8_0)	1m 27s
single-run-different-versions (bigquery, 1_3_0)	1m 22s
single-run-different-versions (bigquery, 1_4_0)	1m 36s
single-run-different-versions (bigquery, 1_5_0)	1m 31s
single-run-different-versions (bigquery, 1_6_0)	1m 36s
single-run-different-versions (bigquery, 1_7_0)	1m 41s
single-run-different-versions (bigquery, 1_8_0)	1m 39s
single-run-different-versions (postgres, 1_3_0)	56s
single-run-different-versions (postgres, 1_4_0)	52s
single-run-different-versions (postgres, 1_5_0)	50s
single-run-different-versions (postgres, 1_6_0)	48s
single-run-different-versions (postgres, 1_7_0)	52s
single-run-different-versions (postgres, 1_8_0)	53s
	29m 39s

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