feat: add `blas/ext/base/dcartesian-product` #38910

Job	Run time
Add initial reaction	0s
Update copyright header years	0s
Print a list of available slash commands	0s
Merge changes from develop branch into this PR	0s
Remove in-progress label	-1s
Post a comment with make command instructions	-1s
Check for required files	-6s
Rebase this PR on top of develop branch	-8s
Auto-fix lint errors	-9s
	-25s

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