Fix CI workflows

[steffyP]

This PR fixes the basic localstack setup functionalities by the setup-localstack action.

• fix issue with referencing the GH_ACTION_VERSION using github.head_ref that caused problems for branch-names containing/

• clean up + fix of the CI tests in .github/workflows/ci.yml:

  • Test LocalStack Version - installs an older version of LS, including the use of the old env LOCALSTACK_API_KEY
  • Test Cloud Pods Action + Test Loading Cloud Pod:
    • creates and uploads a cloud pod (with a random id)
    • then starts a new localstack instance injecting the cloud pod
    • verifies the content was loaded
    • deletes the pod from remote
  • Test Local State Save Action + Test Local State Load Action:
    • exports the state locally (uploaded as artifact),
    • and imports the state in a new instance
    • verifies the resources are available

• temporarly deactivate the CI tests in .github/workflows/ephemeral.yml

  • tests are not working, and as it turned out the API for ephemeral instances is currently unstable
  • will try to improve the action itself in a follow-up PR to see if re-tries/waits makes it more stable and then re-check the CI tests

[steffyP]

FYI: I'm breaking down the cleanup initiative started in #56 into smaller pieces.

[alexrashed]

Awesome! Thanks so much for stabilizing the pipeline, hardening it, and investigating on the ephemeral instance issues! Breaking things up to have small individual PRs is also a great idea given that there might be more to do here to fully clean everything up! 💯 🦸🏽 🧹

[alexrashed]

nit / out of scope: Since we are at it we could also update the secrets names. I created a secret called LOCALSTACK_AUTH_TOKEN which we could use here directly. If refers to the same CI auth token (i.e. it has the same content than LOCALSTACK_API_KEY).

[steffyP]

nice, thanks 😄
i will update the secret in a follow-up PR, already prepared a commit that removes the usage of LOCALSTACK_API_KEY envs