feat: Added helm chart for updating AWS ECR secrets in Kubernetes

[vishu247]

The renew-ecr-k8s-cred Helm chart automates the renewal of AWS Elastic Container Registry (ECR) credentials within Kubernetes environments. This chart provides the update of Kubernetes secrets with refreshed ECR authentication tokens, ensuring continuous access to private ECR repositories. By leveraging a CronJob, the chart periodically retrieves temporary AWS credentials through IAM roles, updates the Kubernetes secrets accordingly.