feat: add `blas/ext/base/ndarray/dunitspace` #26360

Job	Run time
Rebase this PR on top of develop branch	-1s
Remove in-progress label	0s
Auto-fix lint errors	-7s
Check for required files	-7s
Manage labels	-8s
Merge changes from develop branch into this PR	-9s
Update copyright header years	-10s
	-42s

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