Update aws secrets into github for ci workflows

[shawngerrard]

Our CI workflows are currently failing as we do not have aws credentials set up as secrets within this github repository. This issue is reliant on work within issues #15 and #12 to centralize company org accounts and activate auditing within aws.

[jmhbnz]

One thing we may really want to consider for our github workflows is exchanging actions tokens for a signed oidc token to deploy to aws: https://scalesec.com/blog/identity-federation-for-github-actions-on-aws/

I'm happy for this to come later though. The first iteration of the workflows can absolutely just use aws credentials stored in github secrets.

Just want to make you aware of the oidc identity federation option! 💡