[BUG] Improper tiling implementation in PULPOpen for Slice and ReduceMean operators

[diaconuccalin]

Describe the bug

The tiling system currently does not support list values as replacement variables, which affects the Slice and ReduceMean operators. These operators use arbitrary numbers of axes for input and output, which results in their data_in and data_out dimensions producing lists as replacement values.

To Reproduce

Run:

cd DeeployTest
python testRunner_tiled_siracusa.py -t Tests/testFloatDemoTinyViT/ --cores=8 --l1 4000

When checking the generated Network.c file, no tiling for Slice or ReduceMean operations

Expected behavior

Successful tiling for Slice and ReduceMean operations, that will be obtained by adjustings the templates and tiling constraints.

Additional context

Will need to also implement extra testing for Slice and ReduceMean operations.