Add outlier detection failure matcher

networking/v1alpha3/destination_rule.proto

@@ -864,6 +864,21 @@ message OutlierDetection {
   // disabled by setting it to 0%. The default is 0% as it's not typically
   // applicable in k8s environments with few pods per service.
   int32 min_health_percent = 5;
+
+  // Specifies the HTTP response status codes that are treated as outlier
+  // detection errors. If specified, only responses with one of these status
+  // codes will be treated as errors by outlier detection. If not specified,
+  // only 5xx responses are treated as errors.
+  //
+  // Note: Host ejection is still driven by the `consecutive5xxErrors` and
+  // `consecutiveGatewayErrors` thresholds; this field only redefines which
+  // HTTP status codes are counted as errors toward those thresholds.
+  //
+  // Values must be in the range [100, 599].
+  //
+  // +protoc-gen-crd:list-value-validation:Minimum=100
+  // +protoc-gen-crd:list-value-validation:Maximum=599
+  repeated uint32 outlier_detection_http_error_codes = 10;
 }
 
 // SSL/TLS related settings for upstream connections. See Envoy's [TLS