[Refactor] Rename offload_model and dispatch_for_sequential to set_onload_device#2501

nrmlthms wants to merge 7 commits intovllm-project:mainvllm-project/llm-compressor:mainfrom

nrmlthms:rename-offload-model-set-onload-devicenrmlthms/llm-compressor:rename-offload-model-set-onload-deviceCopy head branch name to clipboard