Update ISO installer tiers and backend deployment

ansible/roles/nvidia/tasks/main.yml

@@ -1,6 +1,6 @@
 ---
 # NVIDIA role: Drivers + CUDA + cuDNN
-# NOTE: Tested on L40S (Entry) and A40 (lab). Requires reboot after this role.
+# NOTE: Tested on RTX Pro 6000 (Entry) and A40 (lab). Requires reboot after this role.
 #       If no GPU is present, this role will install drivers but nvidia-smi won't show GPUs.
 
 - name: Add NVIDIA package repository key