Use Boost::json in olp-cpp-sdk-core #2271

Job	Run time
PSV.Linux.22.04.gcc11	9m 2s
PSV.Linux.22.04.gcc9.Cpplint	8m 57s
PSV.Linux.22.04.gcc11.OLP_SDK_NO_EXCEPTION=ON	7m 24s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 12s
PSV.Linux.22.04.gcc9.Tests.CodeCov	12m 4s
PSV.Linux.22.04.clang	10m 40s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	4m 24s
PSV.iOS.MacOS15.Xcode16.ARM64	8m 9s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 1s
PSV.Linux.24.04.gcc13.Tests	8m 1s
PSV.iOS.MacOS14.Xcode15.ARM64	8m 48s
PSV.iOS.MacOS15.Xcode26.ARM64	8m 47s
PSV.Linux.Android.22.04	6m 56s
PSV.Linux.22.04.clang.hidden.OLP_SDK_NO_EXCEPTION=ON	3m 32s
PSV.Commit.Checker	11s
PSV.Win.VC2022	9m 55s
PSV.MacOS15.Xcode16.ARM64	14m 16s
PSV.Clang.Format.Checker	38s
	2h 7m 57s

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