Keep optional stable CUDA kernel feature macros on the source files that consume them instead of adding them to VLLM_GPU_FLAGS. This avoids perturbing unrelated compile commands and invalidating more cache entries when optional kernel families change.
Also align CUTLASS grouped MoE support with the SM10x/SM11x family so Thor works under both CUDA 12 SM101 and CUDA 13 SM110 reporting, and remove the stale ENABLE_CUTLASS_MLA definition left after the old CUTLASS MLA path was deleted.
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Shengqi Chen <harry-chen@outlook.com>