Correct Snowflake example DAG to demonstrate multiple queries run

As per RCA in #1383, to demonstrate multiple queries in a single
statement, the queries need to be independent of each other as they
get run in an async & indepedently of one another  after submission.
Hence, correcting the example DAG to have queries independent of
each other.

closes: #1385

astronomer/providers/snowflake/example_dags/example_snowflake.py

@@ -26,10 +26,16 @@
 
 
 SNOWFLAKE_SAMPLE_TABLE_MULTI = os.getenv("SNOWFLAKE_SAMPLE_TABLE_MULTI", "sample_table_multi")
-MULTIPLE_QUERY_IN_ONE_RUN = (
-    f"CREATE OR REPLACE TRANSIENT TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI} (name VARCHAR(250), id INT);"
-    f"INSERT INTO {SNOWFLAKE_SAMPLE_TABLE_MULTI} VALUES ('name', 1);"
-    f"DROP TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI};"
+MULTIPLE_QUERY_IN_ONE_RUN_CREATE_TABLES = (
+    f"CREATE OR REPLACE TRANSIENT TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_1 (name VARCHAR(250), id INT);"
+    f"CREATE OR REPLACE TRANSIENT TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_2 (name VARCHAR(250), id INT);"
+    f"CREATE OR REPLACE TRANSIENT TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_3 (name VARCHAR(250), id INT);"
+)
+
+MULTIPLE_QUERY_IN_ONE_RUN_DROP_TABLES = (
+    f"DROP TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_1;"
+    f"DROP TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_2;"
+    f"DROP TABLE {SNOWFLAKE_SAMPLE_TABLE_MULTI}_3;"
 )
 
 default_args = {
@@ -74,13 +80,22 @@
         task_id="snowflake_op_sql_select_stmts", sql=SNOWFLAKE_SLACK_SQL, return_last=False
     )
 
-    snowflake_op_multiple_query_in_one_run = SnowflakeOperatorAsync(
-        task_id="snowflake_op_multiple_query_in_one_run", sql=MULTIPLE_QUERY_IN_ONE_RUN, return_last=False
+    snowflake_op_multiple_query_in_one_run_create_tables = SnowflakeOperatorAsync(
+        task_id="snowflake_op_multiple_query_in_one_run_create_tables",
+        sql=MULTIPLE_QUERY_IN_ONE_RUN_CREATE_TABLES,
+        return_last=False,
+    )
+
+    snowflake_op_multiple_query_in_one_run_drop_tables = SnowflakeOperatorAsync(
+        task_id="snowflake_op_multiple_query_in_one_run_drop_tables",
+        sql=MULTIPLE_QUERY_IN_ONE_RUN_DROP_TABLES,
+        return_last=False,
     )
 
     (
         snowflake_op_sql_str
         >> [snowflake_op_with_params, snowflake_op_sql_list, snowflake_op_sql_multiple_stmts]
         >> snowflake_op_sql_select_stmts
-        >> snowflake_op_multiple_query_in_one_run
+        >> snowflake_op_multiple_query_in_one_run_create_tables
+        >> snowflake_op_multiple_query_in_one_run_drop_tables
     )