[V1][Bugfix] Standardize quantized kv cache rejection for attention backends#14221

simon-mo merged 4 commits intovllm-project:mainvllm-project/vllm:mainfrom

neuralmagic:reject-fp8-kv-cache-for-unsupported-attnneuralmagic/vllm:reject-fp8-kv-cache-for-unsupported-attnCopy head branch name to clipboard