Rollup merge of #149344 - lapla-cogito:const_unwrap_sugg, r=Kivooeo

Don't suggest unwrap for Result in const

close rust-lang/rust#149316

Regarding `const fn` that returns `Result`, we should avoid suggesting unwrapping. The original issue reported cases where types didn't match, but in practice, such suggestions may also appear when methods are not found, so this PR includes a fix for that case as well.

Author: matthiaskrgr