tests: Use tmp_path fixture

[martin-kokos]

Using the tmp_path pytest fixture fixes permission errors when running tests inside a sandbox,
https://docs.pytest.org/en/6.2.x/tmpdir.html

FAILED test_command.py::TestCommands::test_deeppatch_command[t1.json-t2.json-args0-0] - PermissionError: [Errno 13] Permission denied: '/tmp/t1.json'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1_corrupt.json-t2.json-args1-1] - PermissionError: [Errno 13] Permission denied: '/tmp/t1_corrupt.json'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1.json-t2_json.csv-args2-0] - PermissionError: [Errno 13] Permission denied: '/tmp/t1.json'
FAILED test_command.py::TestCommands::test_deeppatch_command[t2_json.csv-t1.json-args3-0] - PermissionError: [Errno 13] Permission denied: '/tmp/delta.pickle'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1.csv-t2.csv-args4-0] - PermissionError: [Errno 13] Permission denied: '/tmp/delta.pickle'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1.toml-t2.toml-args5-0] - PermissionError: [Errno 13] Permission denied: '/tmp/delta.pickle'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1.pickle-t2.pickle-args6-0] - PermissionError: [Errno 13] Permission denied: '/tmp/delta.pickle'
FAILED test_command.py::TestCommands::test_deeppatch_command[t1.yaml-t2.yaml-args7-0] - PermissionError: [Errno 13] Permission denied: '/tmp/delta.pickle'

[seperman]

@martin-kokos Cool. I was not aware of the tmp_path fixture.
What kind of sandbox do you run?

[seperman]

I just released DeepDiff 6.2.3 which includes your code too.

[martin-kokos]

Thanks. I'd like to add deepdiff as a package to Gentoo Linux because it is a dependency of poetry. Gentoo's package manager portage builds packages inside a sandbox which doesn't allow operations outside of the build directory itself. Portage also relies on the manifest to populate the sandbox, hence the manifest fix.