[7.16](backport #28440) [Heartbeat] Set log level to warn for zip download errors

[mergify]

This is an automatic backport of pull request #28440 done by Mergify.

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[elasticmachine]

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[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b mergify/bp/7.x/pr-28440 upstream/mergify/bp/7.x/pr-28440
git merge upstream/7.x
git push upstream mergify/bp/7.x/pr-28440

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