LSIF: Disable integration tests when run in root

Created by: efritz

This will run all test if you run yarn run in the lsif directory, which is what happens in CI. This will NOT run integration tests if run from the root (which should only be fast-running unit tests).

Integration tests are xrepo and backend tests that require a live db (with migrations). This often hits the 5000ms startup limit when run concurrently with browser tests.

Note to reviewers: The second commit just renames a directory with a lot of binary files. You only need to read the first commit.