Description of problem: Follow the Doc https://docs.google.com/document/d/1HiK_gDr_jT0eBZjD4kTnrDPL72qalbPuSFo5cn4FMvk/edit to setup ACM + reverse proxy terminates SSL connection.

And also follow the https://issues.redhat.com/browse/ACM-11407 to add custom alert URL into the MCOCR

Followed the https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.10/html/governance/security#replacing-cert-alertmanager to create the BYO secret for replacing certificates for alertmanager route.

But there's no alerts are list in the alert manager

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:

1. Follow the Doc https://docs.google.com/document/d/1HiK_gDr_jT0eBZjD4kTnrDPL72qalbPuSFo5cn4FMvk/edit to setup ACM + reverse proxy terminates SSL connection.

1. Add custom alert URL into the MCOCR
   spec:
     advanced:
       customAlertmanagerHubURL: https://slai-rp-server.dev09.red-chesterfield.com:6443/acm/

2. Followed the https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.10/html/governance/security#replacing-cert-alertmanager to create the BYO secret for replacing certificates for alertmanager route.

1. Check in the alertmanager, there's no alert list
   ```
   cqu-mac:rp-cert changliangqu$ oc -n open-cluster-management-observability exec -it observability-alertmanager-0 -c alertmanager – bash

bash-5.1$ amtool alert --alertmanager.url http://localhost:9093 -o extended
Labels  Annotations  Starts At  Ends At  Generator URL  State
bash-5.1$
```

Actual results:

Expected results:

Additional info: