[Infra][Hosts] Reset SearchBar refresh state to fully disable auto-re…

…fresh (elastic#205416)

## Summary

A bug with the search bar configuration allows for a page that does not
have auto-refresh enabled to inherit the auto-refresh state from another
page that had previously enabled it. This PR fixes that by fully
resetting the state for the page's search bar to ensure auto-refresh is
not active for Hosts page (as it should be).

Closes elastic#205414

## How to test

- Go to Alerts page
- Click on the Date Quick Selector, enable the auto-refresh feature.
Confirm the refresh icon is on the datepicker now.
- Navigate to Hosts page
- The auto-refresh icon on the Hosts page search bar datepicker should
no longer be visible, and opening the date quick selector should not
show any auto-refresh feature/toggle.

(cherry picked from commit d25dcc1)

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

@@ -60,6 +60,7 @@ export const UnifiedSearchBar = () => {
             showQueryMenu
             useDefaultBehaviors
             isAutoRefreshDisabled
+            isRefreshPaused
           />
         </EuiFlexItem>
         <EuiFlexItem>