[Tosa] Disable tosa folder for non-int/float/index types (#71757)

In order to fold, we need to create DenseElementsAttr, which does not
support quantized element types. This patch adds tests for folding
quntized element types and disable tosa folders where appropriate.

refactored canonicalize.mlir test to use --split-input-file

also fixed verifier for trait MulOperandsAndResultElementType for
quantized element types

Signed-off-by: Tai Ly <tai.ly@arm.com>