Snowflake Storage Integration Terraform Module

This Storage Integration terraform module creates the base infrastructure to build storage only pipelines that load data from S3 to Snowflake. The resources created are:

1. Snowflake Storage Integration
2. S3 Bucket
3. S3 Bucket Event
4. AWS SNS topic
5. AWS IAM Role with perms required to access the bucket, and publish/subscribe to SNS topic
6. Trust relationship between the Snowflake Storage integration and AWS IAM Role