Auto merge of #108998 - matthiaskrgr:rollup-sxbdulg, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #106921 (Add documentation about the memory layout of `Cell`)
 - #108828 (Emit alias-eq when equating numeric var and projection)
 - #108834 (Do not ICE when we have fn pointer `Fn` obligations with bound vars in the self type)
 - #108900 (fix(lexer): print whitespace warning for \x0c)
 - #108930 (feat: implement better error for manual impl of `Fn*` traits)
 - #108937 (improve readability of winnowing)
 - #108947 (Don't even try to combine consts with incompatible types)
 - #108976 (Update triagebot rust-analyzer team mention)
 - #108983 (Forbid `#[target_feature]` on safe default implementations)

Failed merges:

 - #108950 (Directly construct Inherited in typeck.)

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

Author: bors