Tensor encoding assumptions in advanced path

[victor-eds]

Advanced path introduces assumptions in tensor encoding. Layouts are a powerful mechanism in Triton to implement some algorithms. Also, upstream Triton has extense code to handle layout conversions in an optimized way that we could use (https://github.com/intel/intel-xpu-backend-for-triton/blob/llvm-target/lib/Conversion/TritonGPUToLLVM/ConvertLayoutOpToLLVM.cpp). We should be aware of this when bringing all of the nice features the advanced path brings so we have access to the best of both worlds when writing future optimizations.