Closes #44038

BM25 results were fully replacing fuzzy results, which caused some items
to disappear from search. For example, "Show Menus" wouldn’t show up
when searching for "menu". This happened due to limitations in the
Porter stemmer used by the library. Fuzzy search matched correctly, but
its results were getting overwritten. We now merge both result sets
instead.

Release Notes:

- Fixed an issue where settings search missed some results, like "Show
Menus" when searching for "menu".