Is your feature request related to a problem? Please describe.

AWS ECS and ECR.

Describe the solution you'd like

Make improvements to ecs module:

• latest image tag is hardcoded for ECS tasks.
• Add lifecycle for untagged images.
• Consider using boto3 for ECS: load_data_task.
• Remove use of AWS-managed IAM policies (AmazonEC*).

Are you going to work on implementing this?

• Yes
• No

Additional context
Parent Issue: #2214