feat(vmmigration): update the API

#### vmmigration:v1alpha1

The following keys were added:
- schemas.DataDiskImageImport.properties.guestOsFeatures.description
- schemas.DataDiskImageImport.properties.guestOsFeatures.items.type
- schemas.DataDiskImageImport.properties.guestOsFeatures.type

#### vmmigration:v1

The following keys were added:
- schemas.DataDiskImageImport.properties.guestOsFeatures.description
- schemas.DataDiskImageImport.properties.guestOsFeatures.items.type
- schemas.DataDiskImageImport.properties.guestOsFeatures.type

Author: yoshi-automation

discovery/vmmigration-v1.json

@@ -2548,7 +2548,7 @@
       }
     }
   },
-  "revision": "20251030",
+  "revision": "20251106",
   "rootUrl": "https://vmmigration.googleapis.com/",
   "schemas": {
     "AccessKeyCredentials": {
@@ -4163,7 +4163,15 @@
     "DataDiskImageImport": {
       "description": "Used when the image import is not using OS adaptation process.",
       "id": "DataDiskImageImport",
-      "properties": {},
+      "properties": {
+        "guestOsFeatures": {
+          "description": "Optional. A list of guest OS features to apply to the imported image. These features are flags that are used by Compute Engine to enable certain capabilities for virtual machine instances that are created from the image. This field does not change the OS of the image; it only marks the image with the specified features. The user must ensure that the OS is compatible with the features. For a list of available features, see https://cloud.google.com/compute/docs/images/create-custom#guest-os-features.",
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
       "type": "object"
     },
     "DatacenterConnector": {

discovery/vmmigration-v1alpha1.json

@@ -2548,7 +2548,7 @@
       }
     }
   },
-  "revision": "20251030",
+  "revision": "20251106",
   "rootUrl": "https://vmmigration.googleapis.com/",
   "schemas": {
     "AccessKeyCredentials": {
@@ -4198,7 +4198,15 @@
     "DataDiskImageImport": {
       "description": "Used when the image import is not using OS adaptation process.",
       "id": "DataDiskImageImport",
-      "properties": {},
+      "properties": {
+        "guestOsFeatures": {
+          "description": "Optional. A list of guest OS features to apply to the imported image. These features are flags that are used by Compute Engine to enable certain capabilities for virtual machine instances that are created from the image. This field does not change the OS of the image; it only marks the image with the specified features. The user must ensure that the OS is compatible with the features. For a list of available features, see https://cloud.google.com/compute/docs/images/create-custom#guest-os-features.",
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
       "type": "object"
     },
     "DatacenterConnector": {