rename olp/porting/optional.hpp into optional.h #2012

Job	Run time
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 32s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 44s
PSV.Linux.22.04.gcc11	8m 28s
PSV.Linux.22.04.gcc9.Cpplint	9m 39s
PSV.MacOS14.Xcode15	3m 51s
PSV.Linux.22.04.gcc13	10m 9s
PSV.MacOS13.Xcode15.x86_64	4m 33s
PSV.Clang.Format.Checker	36s
PSV.iOS.MacOS13.Xcode14	14m 21s
PSV.Linux.Android.22.04	8m 24s
PSV.Linux.22.04.clang	8m 41s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 46s
PSV.Win.VC2022	9m 58s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 27s
PSV.iOS.MacOS14.Xcode15	9m 15s
PSV.iOS.MacOS13.Xcode15	12m 38s
PSV.Commit.Checker	6s
PSV.iOS.MacOS15.Xcode16	6m 2s
PSV.MacOS15.Xcode16	8m 58s
	2h 15m 8s

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