forked from quic-go/quic-go
Several proxy tests timed out because it got stuck in the packet read
loop after all tests have run. Avoid this by running the `conn.Close()`
Cleanup call from `newUPDConnLocalhost` before the timeout handler.
Update CI to run these tests.
Fixes: 3e87ea3f50 ("proxy: add function to simulate NAT rebinding (#4922)")
Relates to: #5009