fix: add back the dropdown options for virtual input app_config_plan (#281)

Author: aatreyee257

ibm_catalog.json

@@ -254,6 +254,20 @@
               "required": true,
               "virtual": true,
               "type": "string",
+              "options": [
+                {
+                  "displayname": "Basic",
+                  "value": "basic"
+                },
+                {
+                  "displayname": "Standard",
+                  "value": "standardv2"
+                },
+                {
+                  "displayname": "Enterprise",
+                  "value": "enterprise"
+                }
+              ],
               "default_value": "basic",
               "description": "The plan to use for the App Configuration service instance."
             },