RUSTSEC-2024-0373: Endpoint::retry() calls can lead to panicking

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Details
Package	quinn-proto
Version	0.11.3
URL	https://github.com/quinn-rs/quinn
Patched Versions	>=0.11.7
Unaffected Versions	<0.11.0
Aliases	GHSA-vr26-jcq5-fjj8, CVE-2024-45311

In 0.11.0, we overhauled the server-side Endpoint implementation to enable
more careful handling of incoming connection attempts. However, some of the
code paths that cleaned up state after connection attempts were processed
confused the initial destination connection ID with the destination connection
ID of a substantial package. This resulted in the internal Endpoint state
becoming inconsistent, which could then lead to a panic.

quinn-rs/quinn@e01609c

Thanks to @finbear for reporting and investingating,
and to @BiagoFesta for coordinating.