Should executorch accept path for load_for_executorch() ?

[mikekgfb]

x-ref:
https://github.com/pytorch/torchchat/actions/runs/9162567537/job/25189812777?pr=809

Easy mitigation:

 exec_lib._load_for_executorch(builder_args.pte_path),
 =>
 exec_lib._load_for_executorch(str(builder_args.pte_path)),

but should users have to mitigate?

Exporting model using ExecuTorch to /Users/runner/work/torchchat/torchchat/stories15M.pte
The methods are:  {'forward'}
Traceback (most recent call last):
Warning: checkpoint path ignored because an exported DSO or PTE path specified
  File "/Users/runner/work/torchchat/torchchat/build/builder.py", line 424, in _initialize_model
    exec_lib._load_for_executorch(builder_args.pte_path),
TypeError: _load_for_executorch(): incompatible function arguments. The following argument types are supported:
    1. (path: str, enable_etdump: bool = False) -> torch::executor::(anonymous namespace)::PyModule

Invoked with: PosixPath('/Users/runner/work/torchchat/torchchat/stories15M.pte')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/runner/work/torchchat/torchchat/torchchat.py", line 107, in <module>
Warning: checkpoint path ignored because an exported DSO or PTE path specified
Using device=cpu Apple M1 (Virtual)
Loading model...
Time to load model: 0.03 seconds
    generate_main(args)
  File "/Users/runner/work/torchchat/torchchat/generate.py", line 791, in main
    _main(
  File "/Users/runner/work/torchchat/torchchat/generate.py", line 533, in _main
    model = _initialize_model(builder_args, quantize, tokenizer)
  File "/Users/runner/work/torchchat/torchchat/build/builder.py", line 437, in _initialize_model
    raise RuntimeError(f"Failed to load ET compiled {builder_args.pte_path}")
RuntimeError: Failed to load ET compiled /Users/runner/work/torchchat/torchchat/stories15M.pte
Error: Process completed with exit code 1.