fixes#14961
Adding the license and updating entitlements is flaky, especially at the start of our `coderdent` testing because, while the actual modifications to the `entitlements.Set` were threadsafe, we could have multiple goroutines reading from the database and writing to the set, so we could end up writing stale data.
This enforces serialization on updates, so that if you modify the database and kick off an update, you know the state of the `Set` is at least as fresh as your database update.
* chore: implement filters for the organizations query
* chore: implement organization sync and create idpsync package
Organization sync can now be configured to assign users to an org based on oidc claims.
