Add support for MultiField on GPU #1139

Job	Run time
ci (Release, linux gnu-10)	1m 27s
ci (Release, linux gnu-12)	40s
ci (Release, linux gnu-7)	1m 22s
ci (Release, linux clang-12)	1m 20s
ci (Release, linux intel)	3m 34s
ci (Release, linux intel-classic)	4m 9s
ci (Release, macos)	51s
ci (Debug, linux gnu-10)	1m 27s
ci (Debug, linux gnu-12)	56s
ci (Debug, linux gnu-7)	1m 24s
ci (Debug, linux clang-12)	1m 24s
ci (Debug, linux intel)	3m 46s
ci (Debug, linux intel-classic)	3m 37s
ci (Debug, macos)	54s
	26m 51s

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