Fix windows permission error when dumping model file

[KristijanFaust-OET]

Closes # (if applicable).

Changes proposed in this Pull Request

Checklist

• Code changes are sufficiently documented; i.e. new functions contain docstrings and further explanations may be given in doc.
• Unit tests for new features were added (if applicable).
• A note for the release notes doc/release_notes.rst of the upcoming release is included.
• I consent to the release of this PR's code under the MIT license.

[coroa]

That's not how to fix the permission problem. You loose that way the automatic cleanup and introduce a race condition.

The permission problem is due to tempfile.NamedTemporaryFile opening the file, which introduces a lock on windows. So you need to close it and then dump into it, instead, while keeping the context manager alive.

Suggested change

	model_dump_path = None
	with tempfile.NamedTemporaryFile(prefix="linopy-", suffix=".nc") as fn:
	model.to_netcdf(fn.name)
	input_file_name = self._upload_file_to_gcp(fn.name)
	model_dump_path = fn.name
	model.to_netcdf(model_dump_path)
	input_file_name = self._upload_file_to_gcp(fn.name)
	with tempfile.NamedTemporaryFile(prefix="linopy-", suffix=".nc") as fn:
	fn.file.close()
	model.to_netcdf(fn.name)
	input_file_name = self._upload_file_to_gcp(fn.name)