[rustdoc] Improve "Types/modules" label on the search results page

[Seeker14491]

The first tab on the search results page is labeled "Types/modules", but the search results include items which are neither, such as functions and macros:

I suggest changing the label to something like "In name".

[JRegimbal]

Maybe "As name" would be better to just match the other tabs?

[Seeker14491]

The "As parameters" and "As return value" tabs only return results that match the whole search text exactly, while the first tab also returns items that partially match the search text. Because of this distinction, I prefer "in" over "as".

[JRegimbal]

Ah my bad I didn't understand the difference between the name search and the parameter/return value searches.

[QuietMisdreavus]

Fixed in #45898