[mlir][tosa] Remove Quantization Attribute (#125479)
Removed the TOSA quantization attribute used in various MLIR TOSA
dialect operations in favour of using builtin attributes.
Update any lit tests, conversions and transformations appropriately.
Signed-off-by: Tai Ly <tai.ly@arm.com>
Co-authored-by: Tai Ly <tai.ly@arm.com>
