Add missing oci_registry_extra_ca_certs for our registry

Lupescu Danielrequested to merge
dlu_add_missing_reg_cert into main

This is to correct the missing oci_registry_extra_ca_certs, issue discovered by @bogdan.nicolae as described bellow:

    conditions:
    - lastTransitionTime: "2026-01-09T09:38:20Z"
      message: 'cannot unpack package: failed to fetch package digest from remote:
        failed to fetch package descriptor with a GET request after a previous HEAD
        request failure: Get "https://172.20.219.235/v2/": tls: failed to verify certificate:
        x509: certificate signed by unknown authority; Get "https://172.20.219.235:443/v2/":
        tls: failed to verify certificate: x509: certificate signed by unknown authority:
        Get "https://172.20.219.235/v2/": tls: failed to verify certificate: x509:
        certificate signed by unknown authority; Get "https://172.20.219.235:443/v2/":
        tls: failed to verify certificate: x509: certificate signed by unknown authority'

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