Config updater outputs misleading warnings

[devon-research]

If I pass an FSDP config flag to finetuning.py, as in e.g.

torchrun \
    --nproc_per_node 4 \
    llama-recipes/examples/finetuning.py \
        --enable_fsdp \
        --model_name meta-llama/Llama-2-7b-hf \
        --dist_checkpoint_root_folder model_checkpoints \
        --dist_checkpoint_folder fine-tuned \
        --pure_bf16 \
        --use_fast_kernels

then in the output I get

Warning: unknown parameter pure_bf16

It looks like the code to update the config has a bug where if a config parameter appears in the FSDP config but not in the training config, it will erroneously output a warning like this.

[HamidShojanazeri]

@devon-research can you please install from src, it works on my end. BTW we did some refactor recently would be great to pull the latest first. Now lama-recipes/examples/finetuning.py is changed to lama-recipes/recipes/finetuning/finetuning.py