Use porting::optional in olp-cpp-sdk-read instead of boost::optional. #2024

Job	Run time
PSV.Linux.22.04.gcc9.Cpplint	9m 22s
PSV.Linux.22.04.gcc11	7m 58s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 14s
PSV.Linux.22.04.gcc9.Tests.CodeCov	11m 6s
PSV.Linux.22.04.clang	9m 29s
PSV.MacOS15.Xcode16	3m 29s
PSV.Commit.Checker	8s
PSV.Win.VC2022	9m 57s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 5s
PSV.Linux.Android.22.04	5m 15s
PSV.iOS.MacOS15.Xcode16	6m 9s
PSV.iOS.MacOS13.Xcode15	11m 52s
PSV.Linux.22.04.gcc13	8m 48s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 27s
PSV.Clang.Format.Checker	31s
PSV.iOS.MacOS14.Xcode15	6m 12s
PSV.MacOS14.Xcode15	3m 9s
PSV.iOS.MacOS13.Xcode14	12m 22s
PSV.MacOS13.Xcode15.x86_64	3m 43s
	1h 59m 16s

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