[APM] Use observer.hostname instead of observer.name (#76074)

Author: dgieselaar

x-pack/plugins/apm/common/__snapshots__/apm_telemetry.test.ts.snap

@@ -78,6 +78,7 @@ export function getApmTelemetryMapping() {
     properties: {
       expected_metric_document_count: long,
       transaction_count: long,
+      ratio: long,
     },
   };
 
@@ -102,10 +103,14 @@ export function getApmTelemetryMapping() {
         properties: {
           current_implementation: aggregatedTransactionsProperties,
           no_observer_name: aggregatedTransactionsProperties,
-          no_rum: aggregatedTransactionsProperties,
-          no_rum_no_observer_name: aggregatedTransactionsProperties,
-          only_rum: aggregatedTransactionsProperties,
-          only_rum_no_observer_name: aggregatedTransactionsProperties,
+          with_country: aggregatedTransactionsProperties,
+        },
+      },
+      environments: {
+        properties: {
+          services_without_environment: long,
+          services_with_multiple_environments: long,
+          top_enviroments: keyword,
         },
       },
       cloud: {
@@ -227,6 +232,7 @@ export function getApmTelemetryMapping() {
           agents: tookProperties,
           cardinality: tookProperties,
           cloud: tookProperties,
+          environments: tookProperties,
           groupings: tookProperties,
           indices_stats: tookProperties,
           integrations: tookProperties,

x-pack/plugins/apm/common/__snapshots__/elasticsearch_fieldnames.test.ts.snap

@@ -31,7 +31,7 @@ export const USER_AGENT_NAME = 'user_agent.name';
 
 export const DESTINATION_ADDRESS = 'destination.address';
 
-export const OBSERVER_NAME = 'observer.name';
+export const OBSERVER_HOSTNAME = 'observer.hostname';
 export const OBSERVER_VERSION_MAJOR = 'observer.version_major';
 export const OBSERVER_LISTENING = 'observer.listening';
 export const PROCESSOR_EVENT = 'processor.event';