filer: add default log purging to master maintenance scripts (#8359)

* filer: add default log purging to master maintenance scripts

* filer: fix default maintenance scripts to include full set of tasks

* filer: refactor maintenance scripts to avoid duplication

weed/command/scaffold/example.go

@@ -1,6 +1,15 @@
 package scaffold
 
-import _ "embed"
+import (
+	_ "embed"
+	"strings"
+
+	"github.com/seaweedfs/seaweedfs/weed/cluster/maintenance"
+)
+
+func init() {
+	Master = strings.ReplaceAll(masterTemplate, "{{DEFAULT_MAINTENANCE_SCRIPTS}}", maintenance.DefaultMasterMaintenanceScripts)
+}
 
 //go:embed filer.toml
 var Filer string
@@ -15,6 +24,7 @@ var Replication string
 var Security string
 
 //go:embed master.toml
+var masterTemplate string
 var Master string
 
 //go:embed shell.toml