Of course there is one-liner PowerShell cmd available to install the Failover Cluster feature that could be leveraged after VM deployed via cloud template and another one-liner to create a cluster, but since the Cluster IP is the prerequisite for this, you'll have to integrate your IPAM Provider (if external) with vRA to be able to obtain the IP address for your cluster.
You can obtain a provider-specific integration package from your IPAM provider's website or the VMware Marketplace for IPAM integration.
Regards,
Shen