Description

Allow to keep file/dir mode and ownership unmanaged (null).

Reviewers list

Strike through any lines that are not applicable (~~line~~) then check the box

Changelog entry and version bump inmanta module release --dev [--major|--minor|--patch] [--changelog-message "<your_changelog_message>"]
Code is clear and sufficiently documented (classes, methods and function docs, document important assumptions, link to reference materials)
Sufficient test cases (reproduces the bug/tests the requested feature)
Correct, in line with design
Type annotations
Issue is in the review column
MR is assigned to first reviewer