[8.15] [UII] Fix `unifiedSearch` mock in `SearchBar&#x…

…60; jest test (#192211) (#192239)

# Backport

This will backport the following commits from `main` to `8.15`:
- [[UII] Fix `unifiedSearch` mock in `SearchBar`
jest test (#192211)](#192211)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Jen
Huang","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-09-06T06:42:47Z","message":"[UII]
Fix `unifiedSearch` mock in `SearchBar` jest test (#192211)\n\n##
Summary\r\n\r\nResolves #181510. Fixes missing method in the mocked
`unifiedSearch`\r\ndependency that was causing flaky test
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Fix `unifiedSearch` mock in `SearchBar` jest
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Fix `unifiedSearch` mock in `SearchBar` jest test (#192211)\n\n##
Summary\r\n\r\nResolves #181510. Fixes missing method in the mocked
`unifiedSearch`\r\ndependency that was causing flaky test
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Fix `unifiedSearch` mock in `SearchBar` jest test (#192211)\n\n##
Summary\r\n\r\nResolves #181510. Fixes missing method in the mocked
`unifiedSearch`\r\ndependency that was causing flaky test
failures.","sha":"24e1b67027c545176fed8d8b5f8b726d45245181"}}]}]
BACKPORT-->

Co-authored-by: Jen Huang <[email protected]>

x-pack/plugins/fleet/public/applications/fleet/components/search_bar.test.tsx

@@ -114,6 +114,7 @@ jest.mock('../hooks', () => {
               },
             },
           ]),
+          hasQuerySuggestions: jest.fn().mockReturnValue(true),
         },
         ui: {
           IndexPatternSelect: jest.fn(),