Export to OCI layout should not attempt to download blob if already exists on target folder

[jonesbusy]

Optimize download

[Horiodino]

Hey @jonesbusy, could you please share a bit more detail about the issue?

[jonesbusy]

When we copy an image from Registry to OCI layout we download each blob even if they already exists on the OCI layout.

I would suggest to take a look at the codebase to understand the different pieces and how it can be optimized