Manager refactor, part 1 (#4298)

* Move BackupDatabase and AnonymiseDatabase to internal/manager
* Rename config.Instance to config.Config
* Rename FFMPEG
* Rework manager and initialization process
* Fix Makefile
* Tweak phasher
* Fix config races
* Fix setup error not clearing

internal/api/routes_performer.go

@@ -23,13 +23,6 @@ type performerRoutes struct {
 	performerFinder PerformerFinder
 }
 
-func getPerformerRoutes(repo models.Repository) chi.Router {
-	return performerRoutes{
-		routes:          routes{txnManager: repo.TxnManager},
-		performerFinder: repo.Performer,
-	}.Routes()
-}
-
 func (rs performerRoutes) Routes() chi.Router {
 	r := chi.NewRouter()