feat(orgpolicy): update the API

#### orgpolicy:v2

The following keys were added:
- schemas.GoogleCloudOrgpolicyV2Constraint.properties.equivalentConstraint.description
- schemas.GoogleCloudOrgpolicyV2Constraint.properties.equivalentConstraint.type

Author: yoshi-automation

discovery/orgpolicy-v2.json

@@ -930,7 +930,7 @@
       }
     }
   },
-  "revision": "20250117",
+  "revision": "20250418",
   "rootUrl": "https://orgpolicy.googleapis.com/",
   "schemas": {
     "GoogleCloudOrgpolicyV2AlternatePolicySpec": {
@@ -978,6 +978,10 @@
           "description": "The human readable name. Mutable.",
           "type": "string"
         },
+        "equivalentConstraint": {
+          "description": "Managed constraint and canned constraint sometimes can have equivalents. This field is used to store the equivalent constraint name.",
+          "type": "string"
+        },
         "listConstraint": {
           "$ref": "GoogleCloudOrgpolicyV2ConstraintListConstraint",
           "description": "Defines this constraint as being a list constraint."

src/apis/orgpolicy/v2.ts

@@ -161,6 +161,10 @@ export namespace orgpolicy_v2 {
      * The human readable name. Mutable.
      */
     displayName?: string | null;
+    /**
+     * Managed constraint and canned constraint sometimes can have equivalents. This field is used to store the equivalent constraint name.
+     */
+    equivalentConstraint?: string | null;
     /**
      * Defines this constraint as being a list constraint.
      */