Creating cluster I still get a timeout towards ecr, even though I've configured a private registry

**What happened**:
Get \"https://anywhere-assets.eks.amazonaws.com/releases/eks-a/manifest.yaml\": dial tcp 65.9.43.57:443: i/o timeout"

**What you expected to happen**:

I have configured a private registry and I need to do a totally air-gapped installation. How can I make it not look for manifest.yaml on the internet?

**How to reproduce it (as minimally and precisely as possible)**:

eksctl anywhere cluster create yadda yadda.

**Anything else we need to know?**:

**Environment**:
- EKS Anywhere Release:
- EKS Distro Release:

Start at the `eksctl anywhere cluster create` entry point and trace the request for `https://anywhere-assets.eks.amazonaws.com/releases/eks-a/manifest.yaml`. Compare that path with the configured private registry behavior. Done means cluster creation no longer requires this internet request during a totally air-gapped installation.

Written by the indexing model from the issue text.