[PM-14484] ApiService showing html in error message (#14658)

* Make ApiService more testable

* Add ApiService tests

* Switch to only reading text/plain content

apps/cli/src/platform/services/node-api.service.ts

@@ -39,6 +39,7 @@ export class NodeApiService extends ApiService {
       logService,
       logoutCallback,
       vaultTimeoutSettingsService,
+      { createRequest: (url, request) => new Request(url, request) },
       customUserAgent,
     );
   }