expose remoteWrite.azureAD in cluster-monitoring-config 

The option is already present in the openshift prometheus operator [1] 
I have a CU sharing this process - documentating how to send metrics to an "Azure Monitor workspace" which suggests using this setting [2][3]

[1] - https://github.com/openshift/prometheus-operator/blob/317d68cde4d7595de17d20c82180473a3bdd8d16/pkg/apis/monitoring/v1/prometheus_types.go#L1457C2-L1457C9 

[2] - https://learn.microsoft.com/en-us/azure/azure-monitor/essentials/prometheus-remote-write-virtual-machines?tabs=entra-application%2Cprom-operator 

[3]- https://learn.microsoft.com/en-us/azure/azure-monitor/essentials/azure-monitor-workspace-overview