Feature Request: Oracle OCI support of image copy to regions

_This issue was originally opened by @Marcus-James-Adams in https://github.com/hashicorp/packer/issues/6952 and has been migrated to this repository. The original issue description is below._

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Historically OCI has only allowed the export and import of Linux Images across regions via object storage. However, that now has been changed to allow the copy of windows as well.

It would good if the OCI packer builder could take advantage of this as it would reduce costs for the multi-machine building.

I would envision it working in a similar method to the alicloud image copy.

https://www.packer.io/docs/builders/alicloud-ecs.html#image_copy_regions