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/resolver_mutation_scraper.go

@@ -7,11 +7,6 @@ import (
 )
 
 func (r *mutationResolver) ReloadScrapers(ctx context.Context) (bool, error) {
-	err := manager.GetInstance().ScraperCache.ReloadScrapers()
-
-	if err != nil {
-		return false, err
-	}
-
+	manager.GetInstance().RefreshScraperCache()
 	return true, nil
 }