Inconsistent dependency names when handling OCI Helmcharts in argocd and helm providers

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A continuation of #33143

Context:
We have a big GitOps repo with both ArgoCD Applications and an Applicationset that installs umbrella charts. After the recent change by Bitnami to OCI charts we had an unexpected change in behavior:

OCI charts in ArgoCD Application resources are detected as Docker images, that causes their depName to be set to the full path of the image. For example:
Update registry-1.docker.io/bitnamicharts/mysql Docker tag to v12.2.1

However, the same doesn't happen with OCI charts set in Chart.yaml (installed with an Applicationset). These are still detected as docker images, but without the repourl prefix:
Update mysql Docker tag to v12.2.1

We have no strong feelings one way or another, but in order to have a sane experience we need to, theoretically...

• Manually group together every application that is installed both ways (potentially huge renovate.json)
• Find a way to rename the depName found by argocd manager (underlying docker integration?) to be just the image tag without the repo url
• OR Find a way to prepend the repo url to the beginning of the ones detected by helm.

So far I haven't been able to fin a way to do the second approach, which I think would be the best solution for us. I've spent a few hours on this and can't seem to find how to do so. I think it may involve a customManager?

Logs (if relevant)

No response

[rarkins]

https://docs.renovatebot.com/configuration-options/#overridedepname