Revert "ThreadPool: Spend less time busy waiting. (#21545)" #22350
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This reverts commit 4e15b22.
Reason: We are seeing an increase in the number of deadlocks after this PR. We have a release coming up next week and do not have enough time to investigate the root cause, hence reverting this PR temporarily. Moreover, this is causing an increase int he binary size.
Description
We are seeing an increase in the number of deadlocks after this PR. We have a release coming up next week and do not have enough time to investigate the root cause, hence reverting this PR temporarily.
Motivation and Context
See above.