Add Delegate interface for OlpClient #2381

Job	Run time
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 20s
PSV.Linux.22.04.gcc11.Tests	14m 0s
PSV.Linux.22.04.gcc11.OLP_SDK_EMBED_BOOST_JSON	3m 55s
PSV.Linux.22.04.gcc11.OLP_SDK_USE_STD_OPTIONAL.OLP_SDK_USE_STD_ANY	3m 55s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 55s
PSV.Linux.22.04.gcc9.Cpplint	12s
PSV.Linux.22.04.gcc11.OLP_SDK_NO_EXCEPTION=ON	5m 21s
PSV.MacOS15.Xcode16.ARM64	18m 34s
PSV.iOS.MacOS15.Xcode16.ARM64	8m 15s
PSV.Linux.24.04.gcc13.Tests	13m 20s
PSV.iOS.MacOS14.Xcode15.ARM64	7m 2s
PSV.Clang.Format.Checker	36s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 14s
PSV.Commit.Checker	9s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 34s
PSV.Win.VC2022	10m 29s
PSV.Linux.Android.22.04	5m 57s
PSV.iOS.MacOS15.Xcode26.ARM64	5m 22s
PSV.Linux.22.04.clang.hidden	3m 57s
PSV.Linux.22.04.clang.Tests	14m 44s
PSV.Linux.latest.gcc14.Tests	13m 37s
	2h 29m 28s

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