Update segment cleanup to support object storage (#2876)

* Add support for S3 cleanup + standardize firing cleanup. Closes #2646

* fix: manually fix post-merge

core/streamState.go

@@ -151,7 +151,9 @@ func startOnlineCleanupTimer() {
 	_onlineCleanupTicker = time.NewTicker(1 * time.Minute)
 	go func() {
 		for range _onlineCleanupTicker.C {
-			transcoder.CleanupOldContent(config.HLSStoragePath)
+			if err := _storage.Cleanup(); err != nil {
+				log.Errorln(err)
+			}
 		}
 	}()
 }