(0.54) Add notify to carrier thread wait path #22355
Merged
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Add a notify to unblocker in both vthread and platform thread wait
paths. Also, fix the lockword comparison to account for different
lockword modes (learning & reserved). Also, add some assertions to
catch invalid cases.
Fixes the MonitorWaitNotify test
Fixes: #22332
Backport of #22308 and #22352