Implement staging and dev workflows for containers and task definitions (and everything else)

[philippemnoel]

Feature Name & Description

staging containers

We want need dev- and staging- task definitions.

In fractal-publish-build.yml we have a workflow for building and pushing container images and another workflow for pushing task definitions from those images.

We would like a container-images-publish-staging-builds.yml that performs these on pushes to dev or staging, appending dev or staging to the task definition name

The Problem It Fixes Testing task defs before pushing!

Feature Implementation See above

[philippemnoel]

Eric did not finish this -- I will implement it on top of the publish-build.yml workflow over the holiday, after integrating in the client-apps-publish workflow. If anyone has implementing detail requests in mind, please list them here.

[philippemnoel]

Context: