Add Delegate interface for OlpClient #2378

Job	Run time
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 51s
PSV.Win.VC2022	10m 27s
PSV.Linux.22.04.clang.hidden	4m 35s
PSV.Clang.Format.Checker	50s
PSV.Linux.22.04.gcc11.OLP_SDK_EMBED_BOOST_JSON	3m 55s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 19s
PSV.Commit.Checker	8s
PSV.Linux.latest.gcc14.Tests	14m 17s
PSV.Linux.22.04.gcc11.OLP_SDK_NO_EXCEPTION=ON	7m 30s
PSV.iOS.MacOS14.Xcode15.ARM64	6m 58s
PSV.MacOS15.Xcode16.ARM64	22m 6s
PSV.Linux.22.04.gcc9.Cpplint	8s
PSV.Linux.22.04.gcc9.Tests.CodeCov	11m 44s
PSV.Linux.22.04.clang.Tests	15m 17s
PSV.iOS.MacOS15.Xcode16.ARM64	6m 58s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 47s
PSV.iOS.MacOS15.Xcode26.ARM64	8m 19s
PSV.Linux.Android.22.04	5m 43s
PSV.Linux.24.04.gcc13.Tests	13m 20s
PSV.Linux.22.04.gcc11.OLP_SDK_USE_STD_OPTIONAL.OLP_SDK_USE_STD_ANY	4m 21s
PSV.Linux.22.04.gcc11.Tests	13m 46s
	2h 39m 19s

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