test: send secure cookies to subdomain.localhost

[yury-s]

This is a follow-up to #35771.

Browser behavior of a Secure cookie set by http://domain:

Site	Chrome	Firefox	Safari
http://localhost	✅ Set & Sent	✅ Set & Sent	❌ Ignored
http://test.localhost	✅ Set & Sent	✅ Set & Sent	❌ Ignored
http://non-localhost	❌ Ignored	❌ Ignored	❌ Ignored

[github-actions]

Test results for "tests 1"

7 flaky

⚠️ [chromium-library] › library/chromium/oopif.spec.ts:284:3 › should click @chromium-ubuntu-22.04-node20
⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:986:7 › cli codegen › should not throw csp directive violation errors @firefox-ubuntu-22.04-node18
⚠️ [chromium-library] › library/client-certificates.spec.ts:400:3 › browser › should not hang on tls errors during TLS 1.2 handshake @ubuntu-22.04-chromium-tip-of-tree
⚠️ [webkit-library] › library/browsercontext-pages.spec.ts:105:3 › should return bounding box with page scale @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › library/video.spec.ts:441:5 › screencast › should work for popups @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › page/page-screenshot.spec.ts:345:5 › page screenshot › should work while navigating @webkit-ubuntu-22.04-node18
⚠️ [playwright-test] › ui-mode-test-watch.spec.ts:145:5 › should watch all @windows-latest-node18-1

39369 passed, 820 skipped
✔️✔️✔️

Merge workflow run.

[yury-s]

@microsoft-github-policy-service rerun