feat(autoware_ground_segmentation): grid data structure revision for efficiency improvement #41171

Job	Run time
make-sure-require-cuda-label-is-present / make-sure-label-is-present	1s
make-sure-label-is-present / make-sure-label-is-present	1s
build-and-test-differential (humble)	8m 21s
build-and-test-differential (humble, -cuda)	8m 34s
clang-tidy-differential	18m 8s
	35m 5s

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