convert : parse safetensors directly (#15667)
* convert : parse safetensors directly
* gguf-py : order safetensors tensors by name
Applies to both local and remote safetensors custom parsing.
This matches the behavior of the official safetensors implementation.
* convert : rename from_safetensors_meta to from_local_tensor
For consistency with from_remote_tensor
* convert : fix no-lazy dtypes from direct safetensors
