Multiple lambdas using same image creates duplicate ECR+image

I found closed issue #2576 which I believe at that point this just wasn't working at all, but it is indeed working, and this is more of a nitpicky efficiency detail I wanted to see if was possible.

I have 2 lambdas referencing the same Metadata image definitions (just different 'cmd's). It works, but it ends up creating multiple ECR's (using --resolve-image-repos), duplicating the image even though it's the same. So it's just an efficiency issue since (my upload speeds are pitiful from home!). I know it works if you manually deploy the image and reference the same ImageUri in config (if not using Metadata) so it is technically feasible.

thanks