Support regular expression in labelFilter (#5174)

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/metric/promethues/PrometheusMetricConverter.java

@@ -118,7 +118,8 @@ public class PrometheusMetricConverter {
                             return true;
                         }
                         return rule._3.getLabelFilter().stream()
-                            .allMatch(matchRule -> matchRule.getOptions().contains(metric.getLabels().get(matchRule.getKey())));
+                            .allMatch(matchRule -> matchRule.getOptions().stream()
+                                .anyMatch(metric.getLabels().get(matchRule.getKey())::matches));
                     })
                     .map(rule -> Tuple.of(rule._1, rule._2, rule._3, metric))
             )