Integration simplification: Snowflake

[TJaniF]

Request type:

• [x] Addition to an existing guide: Add the area-learn and enhancement labels to this issue.

Use case or feature that should be covered:

Short tutorial showing how to use Airflow with Snowflake.

Who the guide is intended for: Users who want to know how to use Airflow with Snowflake.

Are you the right person to review a draft of the guide for technical accuracy? If not, who is? Yes.