Order all keys in config (#8541)

New changes

- return default values when sub-sys is
  not configured.
- state is hidden parameter now
- remove worm mode to be saved in config

cmd/config/policy/opa/help.go

@@ -21,11 +21,6 @@ import "github.com/minio/minio/cmd/config"
 // Help template for OPA policy feature.
 var (
 	Help = config.HelpKVS{
-		config.HelpKV{
-			Key:         config.State,
-			Description: "Indicates if OPA policy is enabled or not",
-			Type:        "on|off",
-		},
 		config.HelpKV{
 			Key:         URL,
 			Description: `Points to URL for OPA HTTP API endpoint. eg: "http://localhost:8181/v1/data/httpapi/authz/allow"`,