Un-skip some Jedi-related tests on Windows.

[ericsnowcurrently]

(See #10357)

We updated CI to test against 3.8 in #10276. That revealed that some of our Jedi-related tests fail on 3.8, but only on Windows. We skipped those tests and need to fix them so they pass.

[kimadeline]

Closing as stale since these tests were removed with #17225.