fix(runloop): skip router rebuilding if reconfigure is running #14056
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Summary
In rare cases, the rebuild timer will interrupt the reconfigure handler because of
router was changed while rebuilding it
, which results in an outdated plugin iterator and balancer.It is hard to test this rare race condition.
Checklist
changelog/unreleased/kong
orskip-changelog
label added on PR if changelog is unnecessary. README.mdIssue reference
KAG-6015