Update Logs Explorer deprecation messages (elastic#201307)

## Summary

It was pointed out in
elastic#199255 (comment)
that the Logs Explorer deprecation messages may no longer be accurate
now that contextual logs features are only available in Discover in the
Observability solution view for 8.x:

![image](https://github.com/user-attachments/assets/d0a63b52-5f6c-44b0-af77-867897e26abb)

I'm not really sure what they should updated to instead, so hopefully
@elastic/obs-ux-logs-team can offer some suggestions.

### Checklist

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This was checked for breaking HTTP API changes, and any breaking
changes have been approved by the breaking-change committee. The
`release_note:breaking` label should be applied in these situations.
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [ ] 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)

(cherry picked from commit 056eba2)

x-pack/plugins/observability_solution/infra/public/components/logs_deprecation_callout.tsx

@@ -26,14 +26,14 @@ const pageConfigurations = {
     dismissalStorageKey: 'log_stream_deprecation_callout_dismissed',
     message: i18n.translate('xpack.infra.logsDeprecationCallout.stream.exploreWithDiscover', {
       defaultMessage:
-        'Logs Stream and Logs Explorer are set to be deprecated. Switch to Discover which now includes their functionality plus more features, better performance, and more intuitive navigation. ',
+        'Logs Stream and Logs Explorer are set to be deprecated. Switch to Discover and enable the new Observability solution for an improved logs experience.',
     }),
   },
   settings: {
     dismissalStorageKey: 'log_settings_deprecation_callout_dismissed',
     message: i18n.translate('xpack.infra.logsDeprecationCallout.settings.exploreWithDiscover', {
       defaultMessage:
-        'These settings only apply to the legacy Logs Stream app. Switch to Discover for the same functionality plus more features, better performance, and more intuitive navigation.',
+        'These settings only apply to the legacy Logs Stream app. Switch to Discover and enable the new Observability solution for an improved logs experience.',
     }),
   },
 };