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
diff --git a/ethosu/vela/high_level_command_to_npu_op.py b/ethosu/vela/high_level_command_to_npu_op.py
index 9b76ec1..f8c9de3 100644
--- a/ethosu/vela/high_level_command_to_npu_op.py
+++ b/ethosu/vela/high_level_command_to_npu_op.py
@@ -117,7 +117,7 @@
     """Specifies type of rounding to be used"""
     rounding_mode = NpuRoundingMode.TFL
     if op.type == Op.ResizeBilinear:
-        rounding_mode = NpuRoundingMode.TRUNCATE
+        rounding_mode = NpuRoundingMode.NATURAL
     elif (
         op.type.npu_block_type in (NpuBlockType.ConvolutionMxN, NpuBlockType.ConvolutionDepthWise)
         and op.ifm.dtype == DataType.int16