az image copy does not support edge zones

> ### `az feedback` auto-generates most of the information requested below, as of CLI version 2.0.62

**Describe the bug**
Trying to copy an image from a region to an edge zone gives the following error:

az image copy --source-resource-group shinimtestpoc --source-object-name clientvmaz1-image-20211018011620-eastus2euap-eastus2euap --target-location eastus2euap --target-resource-group "shinimtestpoc" --target-subscription "baffff89-2c76-424a-af4c-43b7518a3cb8" --edge-zone microsoftrrdclab1
**unrecognized arguments: --edge-zone microsoftrrdclab1**

I think we just overlooked this as part of the issue to support edge zones:
#18971

**To Reproduce**
just try to pass "--edge-zone" to "az image copy"

**Expected behavior**
The image should be copied to the edge zone.

**Environment summary**
Azure portal shell

**Additional context**
This is about edge zones, reach out to me if you need more information.