fix compilation of atlas_test_array for GridTools #858

Job	Run time
ci (Release, linux gnu-10)	8m 17s
ci (Release, linux gnu-12)	9m 32s
ci (Release, linux gnu-7)	8m 15s
ci (Release, linux clang-12)	8m 47s
ci (Release, linux intel)	7m 46s
ci (Release, linux intel-classic)	9m 33s
ci (Release, macos)	13m 27s
ci (Debug, linux gnu-10)	7m 52s
ci (Debug, linux gnu-12)	8m 44s
ci (Debug, linux gnu-7)	7m 30s
ci (Debug, linux clang-12)	7m 27s
ci (Debug, linux intel)	6m 53s
ci (Debug, linux intel-classic)	7m 56s
ci (Debug, macos)	4m 59s
	1h 56m 58s

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