[VR-9109] Support Windows

[mvartakAtVerta]

Various fixes for log_artifacts for windows

Changes

• close NamedTemporaryFiles before passing them downstream (with delete=False) to make Windows happy
• use pip list --format=freeze instead of pip freeze for Windows environment compatibility

[mvartakAtVerta]

Lots of fixes for tests on Windows. Known issues:

1. test_versioning/test_dataset.py::TestPath needs revisiting for path comparisons on windows
2. test_creation_updates_dataset_timestamp shows failures on windows and unix
3. TestPathManagedVersioning.test_mngd_ver_folder shows failure on windows

[liuverta]

I remember having difficulty picking up this PR when it was opened, and now with the numerous merge conflicts I fear it is no longer in a good state.

But make no mistake, Windows: I'm not afraid of you. One day...