feat: custom image name support for Docker builds

[dtsulik]

Which issue(s) does this change fix?

N/A

Why is this change necessary?

Currently the Docker build takes the logical resource ID from the template as the name for the image that gets built and tagged. We are able to customize the tag, but not the name. This forces the same restrictions on the image name allowed characters as the resource ID, meaning we cannot use dashes.

How does it address the issue?

Allows specifying custom image name.

What side effects does this change have?

None. WIP, needs to be tested.

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Review the generative AI contribution guidelines
• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.