The issue is continue to the bug MTV-2500, so when creating that provider with no CA attached or selected 'Skip certificate validation' it end up with "Ready" state, but performing a migration fails with:
virt-v2v: error: exception: libvirt: VIR_ERR_INTERNAL_ERROR: VIR_FROM_ESX: internal error: curl_easy_perform() returned an error: Problem with the SSL CA cert (path? access rights?) (77) : error setting certificate file: /opt/ca-bundle.crt

├── OCP version: 4.20.5
├── MTV version: 2.11.0 (redhat-osbs-on-pr-d58f76fcc1cae1ba6bbaff0095bf33e79c905123)
└── CNV version: 4.20.3

Always

1. Create provider with and don't attach CA or select "Skip certificate validation"   
2. Create a Plan and start cold migration

conversion pod fails with 
virt-v2v: error: exception: libvirt: VIR_ERR_INTERNAL_ERROR: VIR_FROM_ESX: internal error: curl_easy_perform() returned an error: Problem with the SSL CA cert (path? access rights?) (77) : error setting certificate file: /opt/ca-bundle.crt

Migration succeeds