MM-58776 - Change Ancillary Permissions API to POST (#27504)

* make /ancillary a post

* remove get from client, fix tests

* Update permissions.yaml

webapp/platform/client/src/client4.ts

@@ -4130,8 +4130,8 @@ export default class Client4 {
 
     getAncillaryPermissions = (subsectionPermissions: string[]) => {
         return this.doFetch<string[]>(
-            `${this.getPermissionsRoute()}/ancillary?subsection_permissions=${subsectionPermissions.join(',')}`,
-            {method: 'get'},
+            `${this.getPermissionsRoute()}/ancillary`,
+            {method: 'post', body: JSON.stringify(subsectionPermissions)},
         );
     };