Auto merge of #124910 - matthiaskrgr:rollup-lo1uvdn, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #123344 (Remove braces when fixing a nested use tree into a single item)
 - #124587 (Generic `NonZero` post-stabilization changes.)
 - #124775 (crashes: add lastest batch of crash tests)
 - #124869 (Make sure we don't deny macro vars w keyword names)
 - #124876 (Simplify `use crate::rustc_foo::bar` occurrences.)
 - #124892 (Update cc crate to v1.0.97)
 - #124903 (Ignore empty RUSTC_WRAPPER in bootstrap)
 - #124909 (Reapply the part of #124548 that bors forgot)

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