osus does not respect the trustedca in proxy/cluster resource when http/https is not set

Fail to create osus instance on a cluster with cluster-wide ca cert due to cluster-wide cert is not picked up.

# ./oc -n osus get po
NAME                                      READY   STATUS    RESTARTS       AGE
graph-data-tag-digest                     1/1     Running   0              56s
sample-74dffbdffd-9nrx9                   0/2     Running   1 (2m2s ago)   6m6s
sample-7c995c9565-4sb29                   0/2     Running   1 (115s ago)   5m59s
updateservice-operator-5fb779d67b-dn5bk   1/1     Running   0              6m22s

# ./oc -n osus logs sample-74dffbdffd-9nrx9
...
[2023-08-29T08:33:48Z INFO  graph_builder::graph] graph update triggered
[2023-08-29T08:33:48Z TRACE cincinnati::plugins] Running next plugin 'release-scrape-dockerv2'
[2023-08-29T08:33:48Z ERROR graph_builder::graph] failed to fetch all release metadata from ec2-13-59-235-86.us-east-2.compute.amazonaws.com:5000/osus/ocp-release
[2023-08-29T08:33:48Z ERROR graph_builder::graph] http transport error: error sending request for url (https://ec2-13-59-235-86.us-east-2.compute.amazonaws.com:5000/v2/): error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915: (unable to get local issuer certificate)
[2023-08-29T08:33:48Z ERROR graph_builder::graph] error sending request for url (https://ec2-13-59-235-86.us-east-2.compute.amazonaws.com:5000/v2/): error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915: (unable to get local issuer certificate)
[2023-08-29T08:33:48Z ERROR graph_builder::graph] error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915: (unable to get local issuer certificate)
[2023-08-29T08:33:48Z ERROR graph_builder::graph] error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915: (unable to get local issuer certificate)
[2023-08-29T08:33:48Z ERROR graph_builder::graph] error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1915:

# ./oc -n osus get cm
NAME                       DATA   AGE
kube-root-ca.crt           1      7m11s
openshift-service-ca.crt   1      7m11s
sample-config              1      6m30s
sample-env                 7      6m30s

//as above, no cluster-trusted-ca cm created in osus ns, and so no cert mounted.
# ./oc -n osus get po sample-74dffbdffd-9nrx9 -oyaml|grep mountPath:
    - mountPath: /etc/configs
    - mountPath: /var/lib/cincinnati/graph-data
    - mountPath: /var/lib/cincinnati/registry-credentials
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
    - mountPath: /var/lib/cincinnati/graph-data
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount

//But there is indeed cluster wide trusted-ca in proxy/cluster.
# ./oc get proxy cluster -ojson|jq .spec
{
  "trustedCA": {
    "name": "user-ca-bundle"
  }
}

# ./oc -n openshift-config get cm user-ca-bundle -ojson|jq .data
{
  "ca-bundle.crt": ...
}

And in another image-registry pod, the cert is mounted correctly.
# ./oc -n openshift-image-registry get po image-registry-967cb4d66-thqkx -oyaml|grep mountPath:
    - mountPath: /var/run/secrets/cloud
    - mountPath: /etc/secrets
    - mountPath: /etc/pki/ca-trust/extracted
    - mountPath: /etc/pki/ca-trust/source/anchors
    - mountPath: /usr/share/pki/ca-trust-source
    - mountPath: /var/lib/kubelet/
    - mountPath: /var/run/secrets/openshift/serviceaccount
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount

OCP 4.13.9
osus 5.0.2

always

1. Trigger installation with "additionalTrustBundlePolicy: Always" and "additionalTrustBundle" set in install-config.yaml, but no proxy configured. (the additionalTrustBundle is the CA cert signing private registry cert too)
#cat install-config.yaml
...
additionalTrustBundle: |
-----BEGIN CERTIFICATE-----
MIIFqTCCA5GgAwIBAgICEAAwDQYJKoZIhvcNAQELBQAwaTELMAkGA1UEBhMCQ04x
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
additionalTrustBundlePolicy: Always
...

2. Create osus operator
3. Create osus instance

Fail to install osus instance

OSUS instance can be installed successfully