1745292 - Allow using moto server as Lando's S3 bucket

Status: RESOLVED FIXED

(Conduit :: Lando, task, P3)

Description

[Connor Sheehan [:sheehan]]

Right now when developing Lando a user must create a real S3 bucket and use real AWS credentials to upload artifacts to the bucket. It's quite simple to set up a moto server (there is even an official Docker image we can use!) for use in some basic testing. This will require a few changes in mozilla-conduit/lando-api and a few changes in mozilla-conduit/suite.

Note that moto stores all it's data in-memory, so it's not suitable for some long-lived incantation of suite. It works well enough for simple tests and landings though, so it's worth having as an option for running a quick test.

Out of scope for this bug is using moto to mock s3/AWS in our unit tests, which moto supports quite well. For now we'll focus on setting up the mock server for use in suite based testing.