fix(process-utils): replace wmic with powershell for windows process (#7087)

Co-authored-by: Shreya Keshive <skeshive@gmail.com>
Co-authored-by: Arya Gummadi <aryagummadi@google.com>

packages/cli/src/config/config.test.ts

@@ -83,7 +83,7 @@ vi.mock('@google/gemini-cli-core', async () => {
   return {
     ...actualServer,
     IdeClient: {
-      getInstance: vi.fn().mockReturnValue({
+      getInstance: vi.fn().mockResolvedValue({
         getConnectionStatus: vi.fn(),
         initialize: vi.fn(),
         shutdown: vi.fn(),