setup CI to run tests on S3 full access policy module

[ketzacoatl]

With #122 we have implemented tests on one of our S3 modules. The purpose of this issue is to get those tests hooked up to CI. This requires:

• updating .gitlab-ci.yml
• define the stages, with linting being the first, and deploying stuff to aws second
• define a job in the aws stage that has a manual trigger - it does not run on its own when a new build is run on gitlab.. an operator would need to use the gitlab UI to trigger the job to run. I think this is when
• use credentials stored in gitlab secrets for now, we'll probably use vault in the future

[mcgirr]

I'm currently working on this under the ci-s3-full-access-policy-module branch.

The current CI output (still a WIP) is available on the gitlab mirror pipeline for that branch.

[mcgirr]

Closing this issue since it sounds like plan is to eventually shift all the CI for the repo to a Github Workflow as part of changes like #320