MLBEDSW-9633: Extend RewriteRescale to other DataTypes

- Extend RewriteRescale to other IFM precisions by adding a cast to int32
  This adds support for rescales with input_unsigned attributes, where
  the unsigned datatype is not supported by pooling operations.
  operations.
- Handle input_unsigned/output_unsigned on cast operations.
- Rewrite Rescales with 32-bit OFM to Cast + Mul on Ethos-U55

Change-Id: I1dcc1e4e3b4e11494ff322e67fd878ef0a6ea66a
Signed-off-by: Alexander Bengtsson <Alexander.Bengtsson@arm.com>