Decrease allocations in QuadTreeIndex (#1602) #1860

Job	Run time
PSV.Linux.20.04.gcc7.Cpplint	7m 49s
PSV.Linux.20.04.gcc7.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 8s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 48s
PSV.Linux.22.04.gcc11	7m 49s
PSV.MacOS13.Xcode16	3m 7s
PSV.Linux.20.04.clang	8m 8s
PSV.MacOS14.Xcode15	3m 16s
PSV.Linux.22.04.gcc13	12m 33s
PSV.Win.VC2019	9m 9s
PSV.MacOS13.Xcode15.x86_64	4m 40s
PSV.iOS.MacOS13.Xcode15	11m 23s
PSV.iOS.MacOS14.Xcode15	9m 42s
PSV.iOS.MacOS13.Xcode16	6m 22s
PSV.Linux.Android.20.04	8m 28s
PSV.Linux.22.04.gcc13.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	7m 26s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 4s
PSV.Commit.Checker	0s
PSV.iOS.MacOS13.Xcode14	11m 23s
	2h 6m 15s

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