[ECR] [Feature]: Lifecycle policy to mark images in manifest list when marking the manifest list itself

**Tell us about your request**
What do you want us to build? => Improve Lifecycle policy

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

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
As a developer using docker images pushed to AWS ECR, I might have to create docker manifest list.
If I have 2 images tagged `1234` and `abcd` which I use in a manifest list `prod-2021` then I when ECR LifeCycle policy is executed, with a policy to mark tagged images starting with `prod`, and that points to a manifest list, I would like images listed in the manifest to also get marked by that rule.

**Are you currently working around this issue?**
How are you currently solving this problem? => Feature does not exist, we can't rely on tagging the manifest list alone, we have to change the image tags too.

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Start by reading the requested ECR lifecycle-policy behavior and the Docker manifest-list scenario in the issue. Determine how tagged manifest lists and their referenced images are evaluated today, then define acceptance criteria showing that a rule matching the manifest list also marks its listed images.

Written by the indexing model from the issue text.