R1:76523eec6718

Implement DestructibleInterface on Spaces, add some basic tests

Summary: Ref T8377. Mostly just a framework for test coverage.

Test Plan: Tests pass.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8377

Differential Revision: https://secure.phabricator.com/D13102