OSDOCS-3713 adding ultra SSD capability to install doc

Author: bscott-rh

modules/installation-azure-config-yaml.adoc

@@ -41,6 +41,7 @@ controlPlane: <2>
   name: master
   platform:
     azure:
+      ultraSSDCapability: Enabled
       osDisk:
         diskSizeGB: 1024 <5>
         diskType: Premium_LRS
@@ -51,6 +52,7 @@ compute: <2>
   name: worker
   platform:
     azure:
+      ultraSSDCapability: Enabled
       type: Standard_D2s_v3
       osDisk:
         diskSizeGB: 512 <5>
@@ -83,6 +85,8 @@ endif::openshift-origin[]
   - 172.30.0.0/16
 platform:
   azure:
+    defaultMachinePlatform:
+      ultraSSDCapability: Enabled
     baseDomainResourceGroupName: resource_group <7>
 ifndef::gov[]
     region: centralus <1>

modules/installation-configuration-parameters.adoc

@@ -974,6 +974,10 @@ Additional Azure configuration parameters are described in the following table:
 |Defines the type of disk.
 |`standard_LRS`, `premium_LRS`, or `standardSSD_LRS`. The default is `premium_LRS`.
 
+|`compute.platform.azure.ultraSSDCapability`
+|Enables the use of Azure ultra disks for persistent storage on compute nodes. This requires that your Azure region and zone have ultra disks available.
+|`Enabled`, `Disabled`. The default is `Disabled`.
+
 |`controlPlane.platform.azure.osDisk.diskSizeGB`
 |The Azure disk size for the VM.
 |Integer that represents the size of the disk in GB. The default is `1024`.
@@ -982,6 +986,10 @@ Additional Azure configuration parameters are described in the following table:
 |Defines the type of disk.
 |`premium_LRS` or `standardSSD_LRS`. The default is `premium_LRS`.
 
+|`controlPlane.platform.azure.ultraSSDCapability`
+|Enables the use of Azure ultra disks for persistent storage on control plane machines. This requires that your Azure region and zone have ultra disks available.
+|`Enabled`, `Disabled`. The default is `Disabled`.
+
 |`platform.azure.baseDomainResourceGroupName`
 |The name of the resource group that contains the DNS zone for your base domain.
 |String, for example `production_cluster`.
@@ -1007,6 +1015,10 @@ configuring user-defined routing.
 at least two zones.
 |List of zones, for example `["1", "2", "3"]`.
 
+|`platform.azure.defaultMachinePlatform.ultraSSDCapability`
+|Enables the use of Azure ultra disks for persistent storage on control plane and compute machines. This requires that your Azure region and zone have ultra disks available.
+|`Enabled`, `Disabled`. The default is `Disabled`.
+
 |`platform.azure.networkResourceGroupName`
 |The name of the resource group that contains the existing VNet that you want to deploy your cluster to. This name cannot be the same as the `platform.azure.baseDomainResourceGroupName`.
 |String.