show suggestion to replace generic bounds with associated types in more cases

[icewind1991]

Moves the hint to replace generic parameters with associated type bounds from the "not all associated type bounds are specified"(E0191) to "to many generic type parameters provided"(E0107).

Since E0191 is only emitted in places where all associated types must be specified (when creating dyn types), the suggesting is currently not shown for other generic type uses (such as in generic type bounds). With this change the suggesting is always emitted when the number of excess generic parameters matches the number of unbound associated types.

Main motivation for the change was a lack of useful suggesting when doing

fn foo<I: Iterator<usize>>(i: I) {}

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @jackh726 (or someone else) soon.

Please see the contribution instructions for more information.

[bors]

☔ The latest upstream changes (presumably #95506) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #95667) made this pull request unmergeable. Please resolve the merge conflicts.

[jackh726]

Sorry for the delay reviewing here! LGTM! @bors r+

[bors]

📌 Commit decc04d has been approved by jackh726

[bors]

⌛ Testing commit decc04d with merge e2661ba...

[bors]

☀️ Test successful - checks-actions
Approved by: jackh726
Pushing e2661ba to master...

[rust-timer]

Finished benchmarking commit (e2661ba): comparison url.

Summary:

• Primary benchmarks: 🎉 relevant improvement found
• Secondary benchmarks: no relevant changes found

	Regressions 😿 (primary)	Regressions 😿 (secondary)	Improvements 🎉 (primary)	Improvements 🎉 (secondary)	All 😿 🎉 (primary)
count1	0	0	1	0	1
mean2	N/A	N/A	-1.8%	N/A	-1.8%
max	N/A	N/A	-1.8%	N/A	-1.8%

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression

Footnotes

1. number of relevant changes ↩

2. the arithmetic mean of the percent change ↩