This reapplies what we reverted in
https://github.com/microsoft/playwright/pull/32989.
Max and me debugged this, and found that the test failures come from
SOCKS proxy now preferring IPv6 over IPv4. We've updated the tests and
made sure that this doesn't mask any breaking change.
I'm enabling CQ1 to make sure we don't oversee any other CI failures.
When configuring a proxy, Chromium requires a magic tokens to get some
local network requests to go through the proxy. This has tripped up a
few users, so we make the behavior default to the expected: proxy
everything including the local requests. This matches the other vendors
as well.
NB: This can be disabled via
`PLAYWRIGHT_DISABLE_FORCED_CHROMIUM_PROXIED_LOOPBACK=1`
Supercedes: #8345Fixes: #10631
