[Feature Request]: Enable geo-replication for Redis cache.

[Meertman]

Description

A Redis cache supports the setup of geo-replication via bicep through the use of the linked server bicep resource: https://learn.microsoft.com/en-us/azure/templates/microsoft.cache/redis/linkedservers?pivots=deployment-language-bicep

Adding this to the bicep module for deployment of a Redis cache would be a welcome addition.

However the usage of the linked server and a private endpoint proves to be a bit difficult as you cannot add a private link to a Redis cache that is geo-replicated. You first need to remove the geo-replication, then add the link and then re-enable the geo-replication. As documented here: https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-how-to-geo-replication

Specifically:

Private links can't be added to caches that are already geo-replicated. To add a private link to a geo-replicated cache: 1. Unlink the geo-replication. 2. Add a Private Link. 3. Last, relink the geo-replication.