Fixed derivatives for matrix vector multiplication when matrix is spa… #2959

Job	Run time
conda / conda (ubuntu-20.04)	10m 28s
docker / docker (fedora39)	20m 28s
conda / conda (macos-12)	18m 12s
codecheck / codecheck	43m 28s
docker / docker (rocky8)	23m 43s
conda / conda (macos-14)	6m 49s
linux / linux (-doc-mpi-)	37m 1s
linux / linux (-mpi-)	50m 16s
linux / linux (-coverage-mpi-)	1h 1m 18s
linux / linux (-debug-)	29m 31s
mac / macsimple (macos-12)	10m 44s
linux / linux (-debug-mpi-)	39m 31s
mac / macports (macos-12)	19m 20s
mac / macsimple (macos-14)	4m 27s
linux / linux (-intel-)	45m 34s
mac / macports (macos-14)	7m 49s
linux / linux (-pycv-mpi-)	16m 31s
mac / macports (+allmodules, macos-12)	23m 44s
	7h 48m 54s

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