Auto merge of #122041 - matthiaskrgr:rollup-imsmdke, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #121202 (Limit the number of names and values in check-cfg diagnostics)
 - #121301 (errors: share `SilentEmitter` between rustc and rustfmt)
 - #121658 (Hint user to update nightly on ICEs produced from outdated nightly)
 - #121846 (only compare ambiguity item that have hard error)
 - #121961 (add test for #78894 #71450)
 - #121975 (hir_analysis: enums return `None` in `find_field`)
 - #121978 (Fix duplicated path in the "not found dylib" error)
 - #121991 (Merge impl_trait_in_assoc_types_defined_by query back into `opaque_types_defined_by`)

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

Author: bors