Taking this shortcut has two benefits:
1. It allows charts to be fetched from AWS's public container registry
at public.ecr.aws
2. It makes reconciling a HelmChart faster by skipping one or more
potentially expensive API calls to the registry.
I adapted the unit tests to the new behavior that the
OCIChartRepository doesn't fail anymore for the case where a specific
chart version has been requested that doesn't actually exist in the
registry.
refs #845
Signed-off-by: Max Jonas Werner <max@e13.dev>
b86572b98e