test(webapi): run cookie tests in CI

The CI skip guarded against external-URL timeouts; cookie tests now
derive all URLs from siteUrl (local test app), so the guard is obsolete.
Verified with CI=true: Obscura 5 passing, Puppeteer 5 passing,
CDPBrowser/Chrome 6 passing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: DavertMik

test/helper/webapi.js

@@ -1305,10 +1305,6 @@ export function tests() {
   })
 
   describe('cookies : #setCookie, #clearCookies, #seeCookie, #waitForCookie', () => {
-    beforeEach(function () {
-      // Skip in CI to avoid timeouts from external URLs
-      if (process.env.CI || process.env.GITHUB_ACTIONS) this.skip()
-    })
     it('should do all cookie stuff', async function () {
       await I.amOnPage('/')
       await I.setCookie({