Bump Gtest to 1.16.0 #14679

Job	Run time
Ubuntu Build release	19m 7s
Ubuntu Build debug	5m 28s
Ubuntu Build asan	8m 18s
Ubuntu Build msan	9m 14s
Ubuntu Build tsan	6m 11s
Ubuntu Build scalar	4m 14s
Ubuntu Build lowprecision	18m 55s
Ubuntu Build coverage	42s
Ubuntu Build release-nojpeg	5m 20s
Ubuntu Build release-lcms2	5m 8s
Ubuntu Build release-system-lcms2	5m 1s
Ubuntu Build release:arm64	21m 57s
Ubuntu Build release:arm64-lowprecision	21m 43s
Ubuntu Build release:minimal	5m 6s
Ubuntu Build release:gcc	4m 39s
Ubuntu Build release:gcc-old	4m 13s
Ubuntu Build release:gcc-old-old	5m 31s
Ubuntu Build release:clang-old	5m 5s
Ubuntu Build release:clang-old-old	4m 51s
MacOS Build release:osx	3m 37s
MacOS Build release:osx-15	3m 28s
	2h 47m 48s

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