Upstream issue: https://github.com/argoproj/argo-cd/issues/3539

When we add a tls cert for helm repo, the ArgoCD repo server does not read this tls certificate and gives an error `x509: certificate signed by unknown authority`.

Expected behavior: 

ArgoCD repo server should accept the tls certificate when the repo itself is configured.

Current Workaround: 

• https://docs.openshift.com/container-platform/4.11/operators/admin/olm-configuring-proxy-support.html#olm-inject-custom-ca_olm-configuring-proxy-support.
• https://github.com/argoproj/argo-cd/issues/3539#issuecomment-743333648

Acceptance Criteria:

• Find the root cause of why argocd repo server is not able to read the tls certificates
• Add the fix to the issue comments and create a PR upstream