[Do not merge] Ensure OnStart/OnStop hooks can only be called once#950

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sywhang wants to merge 1 commit intouber-go:masterfrom sywhang:931

+74-20

Commits on Sep 28, 2022

Revert "Revert "Ensure OnStart/OnStop hooks can only be called once (uber-go#931 )" (uber-go#946 )"
sywhang
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