Rollup merge of #149380 - JonathanBrouwer:cfg_select_lints, r=Urgau

Run `eval_config_entry` on all branches so we always emit lints

Fixes rust-lang/rust#149090

Ideally I'd have liked to fix this issue using rust-lang/rust#149215, and this is still the long term plan, but this is slightly more annoying to implement than I'd have liked to, and this is also a nice and easy solution to the problem.

r? `@tgross35`

Author: Zalathar