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 isDebugEnabled(r.logger) {
+	if Debug {
 		level.Debug(r.logger).Log("msg", "extracted data debug in regex stage", "extracted data", fmt.Sprintf("%v", extracted))
 	}
 }
@@ -121,7 +121,3 @@ func (r *regexStage) Process(labels model.LabelSet, extracted map[string]interfa
 func (r *regexStage) Name() string {
 	return StageTypeRegex
 }
-
-func isDebugEnabled(logger log.Logger) bool {
-	return level.AllowDebug().Enabled(logger)
-}