Logs Essentials for Observability (#223030)

## Summary
disables features under Application for serverless-essentials.


### Checklist

Check the PR satisfies following conditions. 

Reviewers should verify this PR satisfies this list as well.

- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>

x-pack/solutions/observability/plugins/serverless_observability/server/plugin.ts

@@ -29,12 +29,22 @@ export class ServerlessObservabilityPlugin
 {
   constructor(_initializerContext: PluginInitializerContext) {}
 
-  public setup(_coreSetup: CoreSetup, pluginsSetup: SetupDependencies) {
+  public setup(
+    _coreSetup: CoreSetup<StartDependencies, ServerlessObservabilityPluginStart>,
+    pluginsSetup: SetupDependencies
+  ) {
     pluginsSetup.serverless.setupProjectSettings([
       ...OBSERVABILITY_PROJECT_SETTINGS,
       ...(pluginsSetup.observabilityAIAssistant ? OBSERVABILITY_AI_ASSISTANT_PROJECT_SETTINGS : []),
     ]);
-
+    _coreSetup.pricing.registerProductFeatures([
+      {
+        id: 'observability:complete_overview',
+        products: [{ name: 'observability', tier: 'complete' }],
+        description:
+          'Observability Overview Complete - Enables overview of the Observability solution.',
+      },
+    ]);
     return {};
   }