Set auto commit to true by default in SnowflakeOperatorAsync

[bharanidharan14]

There was an issue SnowflakeOperatorAsync with the auto-commit option which was set to false by default in SQLExecuteQueryOperator the latest apache-airflow-providers-snowflake==4.0.0rc1 was inherited from the SQLExecuteQueryOperator so now it is set to True by default in SnowflakeOperatorAsync

fixes part of #768

[codecov]

Codecov Report

Base: 98.50% // Head: 98.50% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (995b6c1) compared to base (8c2ccfd).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #766   +/-   ##
=======================================
  Coverage   98.50%   98.50%           
=======================================
  Files          86       86           
  Lines        4682     4683    +1     
=======================================
+ Hits         4612     4613    +1     
  Misses         70       70           

Impacted Files	Coverage Δ
...ronomer/providers/snowflake/operators/snowflake.py	100.00% <100.00%> (ø)

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