Improve support for gpui tests that need multiple contexts

If a test function takes multiple contexts, pass it however many
distinct contexts are needed. Construct each one with a different
starting entity id so that they do not share any entity ids.
f46c0a790eMax Brunsfeld committed on 7/8/2021, 12:18:42 AMparent7335e70
5 files changedLine totals unavailable