feat(trafficdirector): update the API

#### trafficdirector:v3

The following keys were added:
- schemas.SocketAddress.properties.networkNamespaceFilepath.description
- schemas.SocketAddress.properties.networkNamespaceFilepath.type

The following keys were changed:
- schemas.SocketAddress.description

Author: yoshi-automation

discovery/trafficdirector-v3.json

@@ -128,7 +128,7 @@
       }
     }
   },
-  "revision": "20250206",
+  "revision": "20250423",
   "rootUrl": "https://trafficdirector.googleapis.com/",
   "schemas": {
     "Address": {
@@ -1102,7 +1102,7 @@
       "type": "object"
     },
     "SocketAddress": {
-      "description": "[#next-free-field: 7]",
+      "description": "[#next-free-field: 8]",
       "id": "SocketAddress",
       "properties": {
         "address": {
@@ -1117,6 +1117,10 @@
           "description": "This is only valid if :ref:`resolver_name ` is specified below and the named resolver is capable of named port resolution.",
           "type": "string"
         },
+        "networkNamespaceFilepath": {
+          "description": "The Linux network namespace to bind the socket to. If this is set, Envoy will create the socket in the specified network namespace. Only supported on Linux. [#not-implemented-hide:]",
+          "type": "string"
+        },
         "portValue": {
           "format": "uint32",
           "type": "integer"

src/apis/trafficdirector/v3.ts

@@ -711,7 +711,7 @@ export namespace trafficdirector_v3 {
     patch?: number | null;
   }
   /**
-   * [#next-free-field: 7]
+   * [#next-free-field: 8]
    */
   export interface Schema$SocketAddress {
     /**
@@ -726,6 +726,10 @@ export namespace trafficdirector_v3 {
      * This is only valid if :ref:`resolver_name ` is specified below and the named resolver is capable of named port resolution.
      */
     namedPort?: string | null;
+    /**
+     * The Linux network namespace to bind the socket to. If this is set, Envoy will create the socket in the specified network namespace. Only supported on Linux. [#not-implemented-hide:]
+     */
+    networkNamespaceFilepath?: string | null;
     portValue?: number | null;
     protocol?: string | null;
     /**