Proposed title of this feature request

Enable internal Prometheus components/probes to function when mTLS is enabled on the web interface.

What is the nature and description of the request?

The Operator must provide a mechanism to ensure internal components (liveness/readiness probes and sidecars like oauth-proxy and config-reloader) can access the Prometheus web endpoint when mTLS (clientAuthType: RequireAndVerifyClientCert) is enabled.

The current setup fails the health checks because probes cannot authenticate.
This issue is already reported on the upstream project. 

Why does the customer need this? (List the business requirements)

The customer needs this feature to satisfy strict security compliance standards by enabling mTLS on the Prometheus web interface.

List any affected packages or components.

Cluster Observability Operator 1.2.2