MLBEDSW-11215: Move RewriteRescaleInputs to TOSA optimiser
- Move RewriteRescaleInputs to tosa_graph_optimiser as this only applies to TOSA input. This also ensures that conversion runs before any other GraphIR optimisation
- Add unit-test for TOSA optimiser
Change-Id: Ib317067a4bfcea0124781baa7ec16cb4766656d0 Signed-off-by: Alexander Bengtsson Alexander.Bengtsson@arm.com