Rollup merge of #143168 - Kivooeo:tf16, r=tgross35

`tests/ui`: A New Order [16/N]

> [!NOTE]
>
> Intermediate commits are intended to help review, but will be squashed prior to merge.

Some `tests/ui/` housekeeping, to trim down number of tests directly under `tests/ui/`. Part of rust-lang/rust#133895.

r? `@tgross35`

(just small one to test new method, also I should squash all this commits except move commit, so we after review will end up having like one move commit and one commit with changes, right?)

Author: dianqk