XWiki.SearchSuggestCode is loaded too early

XWiki.SearchSuggestCode was introduced in XWIKI-22155

Reproduction steps

1. Visit http://localhost:8080/xwiki/bin/view/Sandbox/
2. open the browser debugger and make sure "disabled cache" is unchecked
3. Click on Sandbox Test Page 1 to go to http://localhost:8080/xwiki/bin/view/Sandbox/TestPage1
4. check the network tab

Expected

http://localhost:8080/xwiki/bin/get/XWiki/SearchSuggestCode is not called unless the user needs to make a search

Actual

http://localhost:8080/xwiki/bin/get/XWiki/SearchSuggestCode is called preemptively whenever the user visits a page.
This remote call should only be performed when the user starts using the search.