Sync tests refactor (#13474)

* First simple pass over sync tests

these tests are largely in namespaces that correspond to the source
files

* Fix ns for the linter gods

* Fix ns alias

* Goodbye expectations test

* Autoresolve keywords to keep in lockstep

* Migrates field-value-tests to clojure.test

benefit we get far fewer test dbs created

* Move tests into `sync_instances_test.clj`