build

make sure the new MultiField constructor in actually unit-tested for … #1561

Job	Run time
ci (Release, linux gnu-10)	21m 26s
ci (Release, linux gnu-12)	18m 50s
ci (Release, linux gnu-14)	19m 23s
ci (Release, linux clang-13)	18m 19s
ci (Release, linux clang-18)	18m 29s
ci (Release, linux intel)	11m 47s
ci (Release, linux intel-classic)	21m 16s
ci (Release, linux nvhpc-25.1)	26m 54s
ci (Release, macos)	8m 43s
ci (Debug, linux gnu-10)	23m 44s
ci (Debug, linux gnu-12)	19m 22s
ci (Debug, linux gnu-14)	18m 27s
ci (Debug, linux clang-13)	17m 52s
ci (Debug, linux clang-18)	19m 8s
ci (Debug, linux intel)	11m 15s
ci (Debug, linux intel-classic)	22m 4s
ci (Debug, linux nvhpc-25.1)	20m 47s
ci (Debug, macos)	8m 37s
	5h 26m 23s

Provide feedback