check for `docker.registryOverride` when linting the container config

[mashehu]

Description of feature

The current setup only allows quay.io or community.wave.seqera.io in nf_core/modules/lint/main_nf.py, not allowing valid exceptions like vcr.io/nvidia/clara/, e.g. in nf-core/modules#11217.
We should either have an extendable list of allowed registry in the .nf-core.yml or check docker.registryOverride in a module config.