RFR: 8371471: HttpClient: Log HTTP/3 handshake failures if logging errors is enabled [v4]

[Jaikiran Pai]

On Fri, 7 Nov 2025 17:40:22 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Surprisingly if the QUIC handshake fails exceptionally, and `-Djdk.httpclient.HttpClient.log=errors` is specified, the exception is not logged. This change fixes that.
>
> Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review feedback - request should fail

Marked as reviewed by jpai (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28196#pullrequestreview-3442342722