Use a SmallVector instead of an ArrayRef to materialize a temporary local array

This pattern is error prone and unfortunately none of the sanitizer is catching
it at the moment.

Fixes tensorflow/mlir#192

Closes tensorflow/mlir#193

COPYBARA_INTEGRATE_REVIEW=https://github.com/tensorflow/mlir/pull/193 from joker-eph:fix_array_ref 8092252e64c426c6a8a790b7638f847bea4818b1
PiperOrigin-RevId: 275280201