Add test to verify quic will be disabled after DnsHttpsSvcbAlpn QUIC.

Since WebSockets over HTTP/3 is currently not supported, when there is
an HTTP/3 connection open to a server, a WebSocket request should not
use it, but instead open a new connection with HTTP/1.

Bug: 1286832
Change-Id: Ic8408d212e55db04b2a67f47a4a855dadda286d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4176612
Reviewed-by: Tsuyoshi Horo <horo@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Commit-Queue: Momoka Yamamoto <momoka@google.com>
Cr-Commit-Position: refs/heads/main@{#1094250}