[8.x] Apply shutdown timeout to http server to limit reload delay (backport #14339) #14362
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Motivation/summary
httpServer.stop may block indefinitely, potentially due to misbehaving connections.
Apply shutdown timeout to http server so that in a hot reload, the old and new server overlapping time is bounded.
Checklist
For functional changes, consider:
How to test these changes
May need to change the code to hang the http server to observe the shutdown timeout. Alternatively there may be a way to mock a misbehaving http client without code change.
Related issues
Part of #14337
This is an automatic backport of pull request #14339 done by [Mergify](https://mergify.com).