Fix race conditions in TaskContext and CancellationContext cancellation #2282

Job	Run time
PSV.Linux.24.04.gcc13.Tests	10m 43s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	6m 36s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 38s
PSV.Linux.22.04.gcc9.Cpplint	9s
PSV.Linux.latest.gcc14.Tests	13m 34s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 48s
PSV.Linux.22.04.clang.Tests	10m 39s
PSV.Linux.22.04.gcc9.Tests.CodeCov	6m 30s
PSV.iOS.MacOS15.Xcode26.ARM64	7m 2s
PSV.MacOS15.Xcode16.ARM64	6m 30s
PSV.Linux.Android.22.04	6m 3s
PSV.Commit.Checker	7s
PSV.iOS.MacOS15.Xcode16.ARM64	5m 36s
PSV.Linux.22.04.gcc11.Tests	9m 55s
PSV.Clang.Format.Checker	40s
PSV.iOS.MacOS14.Xcode15.ARM64	7m 23s
PSV.Win.VC2022	10m 38s
	1h 47m 31s

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