Make Date header parsing locale-independent #2191

Job	Run time
PSV.Linux.22.04.gcc9.Tests.CodeCov	2m 55s
PSV.Linux.22.04.gcc9.Cpplint	9s
PSV.Linux.latest.gcc14.Tests	3m 35s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 30s
PSV.Linux.22.04.gcc11.Tests	14m 58s
PSV.Linux.22.04.gcc13.Tests	11m 12s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	4m 46s
PSV.Win.VC2022	6m 43s
PSV.iOS.MacOS15.Xcode26.ARM64	7m 35s
PSV.Clang.Format.Checker	42s
PSV.iOS.MacOS14.Xcode15.ARM64	5m 33s
PSV.MacOS15.Xcode16.ARM64	11m 44s
PSV.Commit.Checker	8s
PSV.iOS.MacOS15.Xcode16.ARM64	6m 27s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	22m 47s
PSV.Linux.Android.22.04	3m 38s
PSV.Linux.22.04.clang.Tests	3m 33s
	1h 48m 55s

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