Renaming: `BoundingBox` -> `BoundingBoxes` (#7778) #626

Job	Run time
linux (linux.12xlarge, cpu) / linux-job	3m 34s
linux (linux.g5.4xlarge.nvidia.gpu, cuda, 11.8) / linux-job	8m 36s
macos (macos-m1-12) / macos-job	2m 6s
macos (macos-12) / macos-job	10m 25s
windows (windows.4xlarge, cpu) / windows-job	10m 18s
windows (windows.g5.4xlarge.nvidia.gpu, cuda, 11.8) / windows-job	10m 5s
	45m 4s

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