[Feat]: Support for AWS ECR Authentication with Temporary Tokens

[tamilhce]

Title: Support for AWS ECR Authentication with Temporary Tokens

Description

We have configured AWS ECR as a sync registry for Zot running in our local cluster. Currently, Zot expects registry credentials in the following format:

"registry2:5000": {
    "username": "user2",
    "password": "pass2"
}

However, AWS ECR provides temporary tokens for authentication, as described in the AWS ECR documentation. For Docker, the amazon-ecr-credential-helper manages this by setting the token in the format expected by the Docker daemon, which is the standard for accessing ECR.

I am opening this ticket to discuss potential options for handling ECR's temporary token mechanism in Zot. I'm happy to contribute by adding an extension to Zot if needed. I would appreciate your valuable suggestions and feedback on the best approach for this enhancement.