Allow the user to override C++ standard #1773

Job	Run time
PSV.Linux.22.04.gcc11	8m 22s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 19s
PSV.Linux.20.04.gcc7.Cpplint	7m 57s
PSV.Linux.20.04.gcc7.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 21s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 25s
PSV.Linux.22.04.gcc13	13m 37s
PSV.Linux.22.04.gcc13.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	6m 21s
PSV.Linux.Android.20.04	5m 33s
PSV.iOS.MacOS13.Xcode15	14m 43s
PSV.Linux.20.04.clang	7m 34s
PSV.MacOS13.Xcode15.x86_64	5m 40s
PSV.MacOS13.Xcode15	1m 56s
PSV.MacOS14.Xcode15	5m 12s
PSV.MacOS13.Xcode16	3m 22s
PSV.Commit.Checker	5s
PSV.iOS.MacOS14.Xcode15	7m 22s
PSV.iOS.MacOS13.Xcode16	4m 57s
PSV.iOS.MacOS13.Xcode14	10m 30s
PSV.Win.VC2019	9m 58s
	2h 8m 14s

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