Auto merge of #149510 - matthiaskrgr:rollup-5rt6o7z, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang/rust#148690 (Implement `clamp_magnitude` method for primitive floats & signed integers)
 - rust-lang/rust#149102 (stabilize maybe_uninit_slice)
 - rust-lang/rust#149269 (cmse: do not calculate the layout of a type with infer types)
 - rust-lang/rust#149299 (Fudge infer vars in the cause code of `Obligation` intentionally)
 - rust-lang/rust#149344 (Don't suggest unwrap for Result in const)
 - rust-lang/rust#149358 (fix(parse): Limit frontmatter fences to 255 dashes )
 - rust-lang/rust#149445 (make assoc fn inherit const stability from inherent `const impl` blocks)
 - rust-lang/rust#149479 (Fix indent in E0591.md)
 - rust-lang/rust#149496 (Fix rust-lang/rust#148889: Add label rib when visiting delegation body)

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

Author: bors