[RAISE-BP] Safely handle masks and modulo ops

[mfrancepillois]

The port of the triton-shared pass to our raise-block-pointer pass revealed some limitations:

• Unstructured memory access masks cannot not be directly forwarded to block pointer access. A more advanced handling is required.
• Modulo are not handled in a safe way that meets production standards (see [RAISE-BP] Add support for arith.remsi|remui as tt.addptr input #1570 (comment) )

These two limitations must be handled safely.
Compiler hints could help handling these two limitations.

[victor-eds]

This approach will not be followed in the future. Rejecting ticket as a consequence.

[etiotto]

For masks the approach we are taking is to remove masks by versioning the loop where possible. This is a partial solution but one that is applicable to GEMM like kernels (e.g. tutorial 03).