[TritonIntelGPU] Add Subgroup2DBlockLoadOpConversion for ttig.2d_block_load#6804

whitneywhtsang wants to merge 4 commits intomainintel/intel-xpu-backend-for-triton:mainfrom

whitneywhtsang/Subgroup2DBlockLoadOpConversionintel/intel-xpu-backend-for-triton:whitneywhtsang/Subgroup2DBlockLoadOpConversionCopy head branch name to clipboard