fix(healthchecks) report timeouts on passive healthchecks #3539
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Report both connection timeouts at the
balancer
phase andupstream timeouts as
timeout
events when using passive healthchecks.Previously, connection timeouts were being misreported as
tcp_failures
.Upstream timeouts can now be caught due to recent runloop improvements for
executing plugins on Nginx-produced errors (#3533).
Includes regression tests for both cases.