Added check in Network.getCookies() to skip duplicate cookies
Also added tests.
Created html files for running tests which set cookies
- remote/cdp/test/browser/network/doc_get_cookies_page.html
- remote/cdp/test/browser/network/doc_get_cookies_frame.html
Added tests to /remote/cdp/test/browser/network/browser_getCookies.js
Updated Puppeteer tests-
- changed Page.setCookie should set secure same-site cookies from a frame spec to PASS
Differential Revision: https://phabricator.services.mozilla.com/D122382