improve regexp performance in loki.process: call fmt only if debug …

…is enabled. fix debug check

internal/component/loki/process/stages/regex.go

@@ -112,7 +112,7 @@ func (r *regexStage) Process(labels model.LabelSet, extracted map[string]interfa
 			extracted[name] = match[i]
 		}
 	}
-    if level.Debug(r.logger).Enabled() {
+    if level.DebugValue() {
       level.Debug(r.logger).Log("msg", "extracted data debug in regex stage", "extracted data", fmt.Sprintf("%v", extracted))
     }
 }