* Proxy can now use QUIC for upstream connections

Add HandshakeTimeout, change h2quic syntax

* Add setup and upstream test

Test QUIC proxy with actual h2quic instance

Use different port fo QUIC test server

Add quic host to CI config

Added testdata to vendor

Revert "Added testdata to vendor"

This reverts commit 959512282deed8623168d090e5ca5e5a7933019c.

* Use local testdata