[Infra Monitoring UI] KQL auto-completion does not work

[weltenwort]

Kibana version: main as of 57f7a48

Original install method (e.g. download page, yum, from source, etc.): from source

Describe the bug:

The auto-completion in the filter bar does not work since #129977 introduced an implicit dependency on the unified-search plugin without actually adding it to the dependencies and without injecting the required service into the React context.

Steps to reproduce:

1. Set up a cluster with logs or metrics.
2. Navigate to the Logs UI or Inventory.
3. Start typing a field name that you know to exist in the query bar.
4. Observe that no auto-completion suggestions are displayed.

Expected behavior:

Suggestions for auto-completing the field names and values are shown when typing in the query bars.

Any additional context:

In

kibana/x-pack/plugins/infra/public/containers/with_kuery_autocompletion.tsx

Line 69 in 57f7a48

this.props.kibana.services.unifiedSearch?.autocomplete.hasQuerySuggestions(language);

the component tries to access the unifiedSearch service, but it has not been added to the plugin context.

[elasticmachine]

Pinging @elastic/infra-monitoring-ui (Team:Infra Monitoring UI)