Add text for cloud provider

https://github.com/rancher/rancher/issues/15652

lib/shared/addon/components/cru-cloud-provider/template.hbs

@@ -40,6 +40,11 @@
       </div>
     </div>
   {{/unless}}
+  {{#if (and (eq driver 'custom') (eq selectedCloudProvider 'none'))}}
+    <div class="col span-6">
+     {{banner-message color="bg-info" icon="icon-info" message=(t 'cloudProvider.custom.notInList' htmlSafe=true)}}
+    </div>
+  {{/if}}
 </div>
 
 <div class="col span-12">

translations/en-us.yaml

@@ -1687,6 +1687,7 @@ cloudProvider:
   azure: Azure
   name: Cloud Provider Name
   custom:
+    notInList: 'If your cloud provider is not listed, please use the <b>Custom</b> option.'
     helpText: 'Please edit the YAML to add in any other <a href="http://rancher.com/docs/rke/v0.1.x/en/config-options/cloud-providers/" target="_blank" rel="nofollow noopener noreferrer">cloud providers</a>'
 
   helpText: |