[beat] Update mappings for APM Server aggregation metrics

packages/beat/changelog.yml

@@ -1,3 +1,8 @@
+- version: 0.1.1
+  changes:
+    - description: Update mappings for APM Server aggregation metrics
+      type: bugfix
+      link: https://github.com/elastic/integrations/pull/5509
 - version: 0.1.0
   changes:
     - description: Add `ssl` configuration option for metricsets

packages/beat/data_stream/stats/fields/fields.yml

@@ -483,7 +483,46 @@
                 - name: active_groups
                   type: long
                 - name: overflowed
+                  type: group
+                  fields:
+                    - name: total
+                      type: long
+                    - name: txn_groups
+                      type: long
+                    - name: per_service_txn_groups
+                      type: long
+                    - name: services
+                      type: long
+            - name: servicetxmetrics
+              type: group
+              fields:
+                - name: active_groups
                   type: long
+                - name: overflowed
+                  type: group
+                  fields:
+                    - name: total
+                      type: long
+            - name: servicesummarymetrics
+              type: group
+              fields:
+                - name: active_groups
+                  type: long
+                - name: overflowed
+                  type: group
+                  fields:
+                    - name: total
+                      type: long
+            - name: spanmetrics
+              type: group
+              fields:
+                - name: active_groups
+                  type: long
+                - name: overflowed
+                  type: group
+                  fields:
+                    - name: total
+                      type: long
         - name: agentcfg
           type: group
           fields: