Feature Request: Add OpenID Connect (OIDC) Authentication Support

[isamuelalmeida]

First of all, thank you for developing this action; it's been very useful.

I would like to request the addition of OpenID Connect (OIDC) authentication support. Currently, authentication is only possible via AWS access keys, which requires managing long-term credentials. By implementing OIDC, users can leverage GitHub's built-in OIDC support to obtain short-lived credentials securely.

Additionally, it would be great if the action could accept credentials from a previous job in the workflow. This way, a prior action could handle the authentication, and then kciter/aws-ecr-action could perform the image push without needing to authenticate again. This would provide more flexibility in handling authentication within the GitHub Actions workflow.