feat(networkconnectivity)!: update the API

BREAKING CHANGE: This release has breaking changes.

#### networkconnectivity:v1

The following keys were deleted:
- schemas.ConsumerPscConfig.properties.serviceAttachmentIpAddressMap.readOnly

The following keys were changed:
- schemas.ConsumerPscConfig.properties.serviceAttachmentIpAddressMap.description

Author: yoshi-automation

discovery/networkconnectivity-v1.json

@@ -3540,7 +3540,7 @@
       }
     }
   },
-  "revision": "20251113",
+  "revision": "20251209",
   "rootUrl": "https://networkconnectivity.googleapis.com/",
   "schemas": {
     "AcceptHubSpokeRequest": {
@@ -3870,8 +3870,7 @@
           "additionalProperties": {
             "type": "string"
           },
-          "description": "Output only. A map to store mapping between customer vip and target service attachment. Only service attachment with producer specified ip addresses are stored here.",
-          "readOnly": true,
+          "description": "Optional. A map to store mapping between customer vip and target service attachment. This field can be used to specify a static IP address for a PSC connection.",
           "type": "object"
         },
         "state": {

src/apis/networkconnectivity/v1.ts

@@ -329,7 +329,7 @@ export namespace networkconnectivity_v1 {
      */
     project?: string | null;
     /**
-     * Output only. A map to store mapping between customer vip and target service attachment. Only service attachment with producer specified ip addresses are stored here.
+     * Optional. A map to store mapping between customer vip and target service attachment. This field can be used to specify a static IP address for a PSC connection.
      */
     serviceAttachmentIpAddressMap?: {[key: string]: string} | null;
     /**