[torch][canonicalizer] Add handling for torch.aten.cat ops with operands with shape (0,)

[vakumar1]

• the torch aten.cat op has a canonicalization rule that uses an assumption that every operand has the same rank and has the same shape (expect for the concatenation dim)
• this assumption is not necessarily valid - the input tensors may be empty and have shape (0,) https://docs.pytorch.org/docs/stable/generated/torch.cat.html
• --> if the operand tensor is empty it is skipped in the canonicalization rule