[Fargate] [request]: Lazily load container images with SOCI from 3rd party registries

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**Tell us about your request**
Lazy loading container images with SOCI on AWS Fargate only supports container images stored in a private ECR repository. [SOCI has been tested on a range of other registries](https://github.com/awslabs/soci-snapshotter/blob/main/docs/registry.md), it would be good if you can use these other registries with Fargate Tasks.

**Which service(s) is this request for?**
Fargate

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
Lazy Load container images from other container registries on AWS Fargate.

**Are you currently working around this issue?**
Store a copy of all container images in ECR.

**Additional context**

**Attachments**

No repository files, tests, or entry points are identified in the request. Start with the linked SOCI registry documentation and the Fargate request details; done would require defined support for lazily loading images from the tested third-party registries without copying them into ECR.

Written by the indexing model from the issue text.