[Profiling] fix bug when APM integration is no available (elastic#165809

)

We've identified a buggy scenario when a user has a cluster prior 8.5
and wants to upgrade to >8.9. In this case, Profiling looks after the
`elastic-cloud-apm` integration to see if Profiling had been enabled
previously. But for the versions before 8.5 this integration did not
exist under this name causing the set up to crash.

I fixed the issue by catching the exception and returning that profiling
is not enabled on the apm server, as it's not installed.

Before:
```
Error: Saved object [ingest-package-policies/elastic-cloud-apm] not found
    at Function.createGenericNotFoundError (saved_objects_error_helpers.ts:258:28)
    at performGet (get.ts:80:36)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at SavedObjectsRepository.get (repository.ts:370:12)
    at SavedObjectsClient.get (saved_objects_client.ts:119:12)
    at PackagePolicyClientImpl.get (package_policy.ts:495:29)
    at validateProfilingInApmPackagePolicy (fleet_policies.ts:193:23)
    at async Promise.all (index 5)
    at setup.ts:99:31
    at Router.handle (router.ts:212:30)
    at handler (router.ts:162:13)
    at exports.Manager.execute (/Users/caue.marcondes/elastic/other_kibana/node_modules/@hapi/hapi/lib
```

After:
```
{
  "has_setup": false,
  "has_data": false,
  "pre_8_9_1_data": false
}
```

---------

Co-authored-by: Francesco Gualazzi <[email protected]>
(cherry picked from commit a00e5e3)

x-pack/plugins/profiling/server/lib/setup/fleet_policies.ts

@@ -189,17 +189,23 @@ export async function validateProfilingInApmPackagePolicy({
   soClient,
   packagePolicyClient,
 }: ProfilingSetupOptions): Promise<PartialSetupState> {
-  const apmPolicy = await getApmPolicy({ packagePolicyClient, soClient });
-
-  return {
-    policies: {
-      apm: {
-        profilingEnabled: !!(
-          apmPolicy && apmPolicy?.inputs[0].config?.['apm-server'].value?.profiling
-        ),
+  try {
+    const apmPolicy = await getApmPolicy({ packagePolicyClient, soClient });
+    return {
+      policies: {
+        apm: {
+          profilingEnabled: !!(
+            apmPolicy && apmPolicy?.inputs[0].config?.['apm-server'].value?.profiling
+          ),
+        },
       },
-    },
-  };
+    };
+  } catch (e) {
+    // In case apm integration is not available ignore the error and return as profiling is not enabled on the integration
+    return {
+      policies: { apm: { profilingEnabled: false } },
+    };
+  }
 }
 
 export async function removeProfilingFromApmPackagePolicy({