Remove AWS secrets manager in local tests

[tyrannosaurus-becks]

When running make test locally, it fails before running the tests with:

An error occurred (AccessDeniedException) when calling the CreateSecret operation: User: arn:aws:iam::733164497221:user/becca is not authorized to perform: secretsmanager:CreateSecret on resource: 
<redacted>

This occurs because I don't have sufficient privileges to use AWS secrets manager on my local user account.

One option for fixing it would be that I could just add permissions. However, secrets do have a cost associated with them, and we should only be automating running tests that use free resources. Also, we wouldn't want all contributors to have to add CreateSecret permissions to their local account in order to successfully run tests.

Can we instead disable these tests locally, but leave them enabled remotely?