Only count 5xx as error in Envoy ALS receiver (#7111)

CHANGES.md

@@ -13,6 +13,7 @@ Release Notes.
 #### OAP-Backend
 * Disable Spring sleuth meter analyzer by default.
 * Use MAL to calculate JVM metrics, remove OAL dependency.
+* Only count 5xx as error in Envoy ALS receiver.
 
 #### UI
 

oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/LogEntry2MetricsAdapter.java

@@ -96,7 +96,7 @@ public class LogEntry2MetricsAdapter {
         final String endpoint = endpoint();
         int responseCode = entry.getResponse().getResponseCode().getValue();
         responseCode = responseCode > 0 ? responseCode : 200;
-        final boolean status = responseCode >= 200 && responseCode < 400;
+        final boolean status = responseCode < 500;
         final Protocol protocol = requestProtocol(entry.getRequest());
         final String tlsMode = parseTLS(properties.getTlsProperties());
         final String internalErrorCode = parseInternalErrorCode(properties.getResponseFlags());