Remove unused sparseml.export utilities

[kylesayrs]

Background

• While implementing Vision Datasets #943, I discovered a list of model files which conflict with the files that would be saved by image processors

Purpose

• Remove old utilities which are not used and are misleading w.r.t. how llm-compressor currently works

Changes

• Remove the following functions and constant definitions

"TaskNames",
"resolve_sequence_length",
"ALL_TASK_NAMES",
"create_fake_dataloader",
"POSSIBLE_TOKENIZER_FILES",
"download_repo_from_huggingface_hub",
"download_model_directory",

• Rename RECIPE_NAME to RECIPE_FILE_NAME and make use of it in compressed_tensors_utils.py, session_mixin.py, and model_load/helpers
• Add import for ModelArguments, TrainingArguments when type checking

Testing

grep -r 'RECIPE_NAME\|TaskNames\|resolve_sequence_length\|ALL_TASK_NAMES\|create_fake_dataloader\|POSSIBLE_TOKENIZER_FILES\|download_repo_from_huggingface_hub\|download_model_directory' src/ examples/ tests/

grep -r '"recipe.yaml"' src/