CI setup for AWS

[phbnf]

• [ ] provide basic backend storage setup
  • [ ] eventually, use Aurora Serverless instead of setting up a new AuroraDB every time
• [ ] integrate with lambda function to run the conformance test (I haven't tested this yet with lambda functions, but did so from a VM)
  • [ ] add a VPC between the lambda function and S3
  • [ ] set-up service accounts
  • [ ] use IAM for database authentication
• [ ] integrate with a build pipeilne
• [ ] connect the build pipeline to git