Disallow and suppress misused spread operator. (#23294)

packages/core/src/tools/write-file.test.ts

@@ -367,6 +367,7 @@ describe('WriteFileTool', () => {
       const abortSignal = new AbortController().signal;
 
       const mockGemini3Config = {
+        // eslint-disable-next-line @typescript-eslint/no-misused-spread
         ...mockConfig,
         getActiveModel: () => 'gemini-3.0-pro',
       } as unknown as Config;