OIDC auth in CI workflow

[alambike]

Motivation

We need to authenticate in the org registries, to the CI workflow be able to use images from private registries.

Also, we can take advantage of this to have access, in the same way, to a AWS Parameter store or Azure Keyvault, through the OIDC flow, so that we have a vault of secrets accessible from the CI workflow, leaving the references to the values that feed the workflow. the location of those secrets.

Related to https://github.com/prefapp/firestarter-workflows/issues/13

Acceptance criteria

• [x] Common logic implemented in https://github.com/prefapp/firestarter-workflows/pull/31 & https://github.com/prefapp/firestarter-workflows/pull/30 moved to common module, instead of build-images
• [x] CI workflow allowed to pull images from org registries with OIDC

[alambike]

@jalvarezit can we close this?

[jalvarezit]

@alambike I was waiting for this PR to be approved but we can close it since is not directly specified in the acceptance criteria