[Infrastructure UI] Set unified search bar displayStyle to 'inPage' o…

…n hosts page (#146671)

Closes: #146670 

## Summary

This PR fixes the unified search bar size on the host view page.

x-pack/plugins/infra/public/pages/metrics/hosts/components/unified_search_bar.tsx

@@ -76,6 +76,7 @@ export const UnifiedSearchBar = ({ dataView }: Props) => {
         showSaveQuery
         showQueryInput
         onFiltersUpdated={onFilterChange}
+        displayStyle="inPage"
       />
       <ControlsContent
         timeRange={unifiedSearchDateRange}