**What did you do to encounter the bug?** Steps to reproduce the behavior: 1. In CRDs, set spec.security.tls.enabled = true, and other tls settings. 2. In CRDs, set spec.prometheus.tlsSecretKeyRef a kubernetes secret name. 3. Apply CRDs. 4. There are 2 certificates mount in same mount point /var/lib/tls/server, and it cause pod can not start. **Screenshots**  **Additional context** Please change tlsOperatorSecretMountPath in [buildTLSPrometheus](https://github.com/mongodb/mongodb-kubernetes-operator/blob/e868003ba070f9a28a891b96355769a8616fa02c/controllers/mongodb_tls.go#L315)