Fix memory leak in QuadTreeIndex #2262

Job	Run time
PSV.Linux.latest.gcc14.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	4m 58s
PSV.Linux.22.04.gcc9.Cpplint	11s
PSV.Linux.22.04.gcc9.Tests.CodeCov	10m 12s
PSV.Linux.latest.gcc14.Tests	16m 19s
PSV.iOS.MacOS15.Xcode26.ARM64	7m 48s
PSV.Linux.24.04.gcc13.Tests	14m 50s
PSV.Linux.22.04.clang.Tests	13m 43s
PSV.Linux.22.04.gcc11.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	3m 15s
PSV.Linux.22.04.gcc9.OLP_SDK_ENABLE_DEFAULT_CACHE=OFF	2m 38s
PSV.MacOS15.Xcode16.ARM64	6m 59s
PSV.Clang.Format.Checker	33s
PSV.iOS.MacOS15.Xcode16.ARM64	7m 7s
PSV.Linux.22.04.gcc11.Tests	14m 20s
PSV.iOS.MacOS14.Xcode15.ARM64	6m 8s
PSV.Win.VC2022	10m 24s
PSV.Commit.Checker	9s
PSV.Linux.Android.22.04	7m 1s
	2h 6m 35s

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