ARROW-10756: [Rust][DataFusion] Fix reduntant clones
ARROW-10756: [Rust][DataFusion] Fix reduntant clones

This fixes the CI.
Was introduced in https://github.com/apache/arrow/pull/8688 , I guess because the CI there ran before the merge.

Closes #8791 from Dandandan/fix_clone

Authored-by: Heres, Daniel <61924dac3230581b78b62e9e0cd0f8203281db27@gmail.com>
Signed-off-by: Neville Dipale <4e1ab218b24f06847d563ff3773c7517c139f863@gmail.com>

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