Support AL2023 minimal AMI

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**Tell us about your request**

Provide AL2023 minimal AMIs as managed images, or clarify that they already work as custom images.

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**

EC2 Image Builder doesn't provide the AL2023 minimal AMIs as managed images, so you have to use them as custom AMIs. However, the image recipe creation UI says this about using custom AMIs:

> The SSM Agent must be pre-installed in the selected AMI.

The AL2023 minimal AMI doesn't come with `amazon-ssm-agent`, according to https://docs.aws.amazon.com/linux/al2023/ug/image-comparison.html.

**Are you currently working around this issue?**

My image recipes using AL2023 minimal AMIs _seem_ to work properly, however I don't know if I'm missing something.

Start with the AL2023 image comparison linked in the issue and the EC2 Image Builder image recipe creation UI behavior for custom AMIs. Determine whether AL2023 minimal AMIs can be provided as managed images or already work as custom images without the pre-installed SSM Agent requirement; done means one of those two paths is clarified or supported.

Written by the indexing model from the issue text.