When encountering .iter() on an impl Iterator, suggest removing the method call #153667
Description
When encountering .iter() on an impl Iterator, suggest removing the method call:
serror[E0599]: no method named `iter` found for opaque type `impl std::iter::Iterator<Item = &AssocItem> + '_` in the current scope
--> compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs:3130:67
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3130 | if !self.tcx.provided_trait_methods(trait_def_id).iter().any(|method| {
| ^^^^
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help: there is a method `filter` with a similar name, but with different arguments
--> /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/iter/traits/iterator.rs:911:4
This can likely be done generally by looking at every method with that name and seeing if their return type matches the impl Trait we already have.