Force XCode version for macos15 build #2038

Job	Run time
PSV.Linux.22.04.gcc9.Cpplint	10m 12s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 28s
PSV.MacOS15.Xcode16	2m 48s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 6s
PSV.Linux.22.04.gcc13	14m 22s
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 3s
PSV.iOS.MacOS13.Xcode14	10m 21s
PSV.iOS.MacOS13.Xcode15	11m 54s
PSV.Linux.22.04.gcc11	8m 38s
PSV.MacOS14.Xcode15	3m 25s
PSV.iOS.MacOS15.Xcode16	5m 7s
PSV.iOS.MacOS14.Xcode15	5m 53s
PSV.Linux.22.04.clang	9m 25s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 43s
PSV.MacOS13.Xcode15.x86_64	5m 17s
PSV.Linux.Android.22.04	5m 58s
PSV.Win.VC2022	10m 16s
PSV.Clang.Format.Checker	2m 18s
PSV.Commit.Checker	6s
	2h 5m 20s

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