Add Delegate interface for OlpClient #2380

Job	Run time
PSV.Linux.24.04.gcc13.Tests	13m 30s
PSV.Linux.22.04.gcc11.OLP_SDK_NO_EXCEPTION=ON	7m 41s
PSV.Linux.22.04.gcc9.Tests.CodeCov	11m 31s
PSV.Linux.22.04.gcc9.Cpplint	8s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 46s
PSV.Linux.22.04.gcc11.Tests	14m 23s
PSV.Linux.22.04.gcc11.OLP_SDK_USE_STD_OPTIONAL.OLP_SDK_USE_STD_ANY	3m 50s
PSV.MacOS15.Xcode16.ARM64	7m 52s
PSV.iOS.MacOS15.Xcode16.ARM64	8m 22s
PSV.Linux.latest.gcc14.Tests	13m 47s
PSV.iOS.MacOS15.Xcode26.ARM64	5m 32s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 9s
PSV.Win.VC2022	10m 41s
PSV.Linux.Android.22.04	5m 44s
PSV.Clang.Format.Checker	47s
PSV.Commit.Checker	8s
PSV.Linux.22.04.clang.hidden	4m 23s
PSV.Linux.22.04.gcc11.OLP_SDK_EMBED_BOOST_JSON	4m 6s
PSV.Linux.22.04.clang.Tests	15m 11s
PSV.iOS.MacOS14.Xcode15.ARM64	5m 41s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 42s
	2h 21m 54s

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