test(ui): improve provider page load handling in tests

- Added a wait for network idle state in the ProvidersPage test to ensure all network requests are completed before proceeding.
- This enhancement improves the reliability of the test by ensuring the page is fully loaded before assertions are made.

ui/tests/providers/providers-page.ts

@@ -288,6 +288,7 @@ export class ProvidersPage extends BasePage {
 
     await expect(this.page).toHaveTitle(/Prowler/);
     await expect(this.addProviderButton).toBeVisible();
+    await this.page.waitForLoadState('networkidle');
   }
 
   async verifyConnectAccountPageLoaded(): Promise<void> {