Cookie value is limited by 4096 characters in the browsers. If
setCookies failed we try setting each cookie individually just in case
only some of them are bad.
Fixes https://github.com/microsoft/playwright/issues/27165
The browser has to be launch with `proxy: 'per-context'` option for the
tests to work on Windows.
Fixes the following:
```
Error: browser.newContext: Browser needs to be launched with the global proxy. If all contexts override the proxy, global proxy will be never used and can be any string, for example "launch({ proxy: { server: 'http://per-context' } })"
at D:\a\playwright\playwright\tests\library\browsercontext-fetch.spec.ts:382:19
```
Fixes https://github.com/microsoft/playwright/issues/19879.
This part is then similar to how node-fetch is doing it:
55a4870ae5/src/index.js (L152-L159)
node-fetch also throws as of today with this URL. Before in Python it
was stalling, because the error was written to stdout and on Windows the
stdout wasn't working. On Node.js it ended up in an unhandled exception.
