Auto merge of #125086 - matthiaskrgr:rollup-xob4lof, r=matthiaskrgr

Rollup of 5 pull requests

Successful merges:

 - #119515 (style-guide: Format single associated type `where` clauses on the same line)
 - #119959 ([meta] Clarify prioritization alert)
 - #123817 (Stabilize `seek_seek_relative`)
 - #125063 (Don't call `env::set_var` in `rustc_driver::install_ice_hook`)
 - #125071 (Migrate rustdoc target spec json path)

r? `@ghost`
`@rustbot` modify labels: rollup