[RHOCP 4.10] Failed to load SNI cert and key tls found a certificate rather than a key in the PEM for the private key - Cluster API server unavailable after API certificate update

Issue

• What causes the error failed to load SNI cert and key: tls: found a certificate rather than a key in the PEM for the private key after API certificate update.
• After updating the API and Ingress certificates, the API and Console became unavailable.
• OpenShift oAuth API server cannot connect to etcd.