Auto merge of #148178 - matthiaskrgr:rollup-yy0swwt, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #147840 (Rework unsizing coercions in the new solver)
 - #148139 (Add `coverage` scope for controlling paths in code coverage)
 - #148154 (Add a mailmap entry)
 - #148158 (ci: loongarch64: use medium code model to avoid relocation overflows)
 - #148172 (rustc-dev-guide subtree update)
 - #148175 (Fix typos: duplicate words in comments)

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

Author: bors