MLBEDSW-3319: Bring-up tests regression fix

A number of bring-up were failing after the update
to TensorFlow 2.3. After updating to TensorFlow 2.5
the problems persisted and more failures were
introduced when they were expected to be solved.
However, with this small patch that changes the
rounding mode for ResizeBilinear, all tests now pass.

Signed-off-by: Dwight Lidman <dwight.lidman@arm.com>
Change-Id: I5f2f3859b9008187ca318d5270da7b850b170b18