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ARROW-18321: [R] Add tests for binary_slice kernel (#14647)

This PR adds a test for the kernel implemented in ARROW-17301 (#14550).

Are there any R functions that map to this? (i.e., is there any `register_binding()` we should do for an R function?)

Authored-by: Dewey Dunnington <dewey@voltrondata.com>
Signed-off-by: Dewey Dunnington <dewey@voltrondata.com>