Link impl items to corresponding trait items in late resolver.

[cjgillot]

Hygienically linking trait impl items to declarations in the trait can be done directly by the late resolver. In fact, it is already done to diagnose unknown items.

This PR uses this resolution work and stores the DefId of the trait item in the HIR. This avoids having to do this resolution manually later.

r? @matthewjasper
Related to #90639. The added trait_item_id field can be moved to ImplItemRef to be used directly by your PR.

[cjgillot]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[bors]

⌛ Trying commit 12d0895e72706e7e04f56436086e311b92004dee with merge 6eefde53ba5a5fd9bfcac37431aafdd496f5aa62...

[bors]

☀️ Try build successful - checks-actions
Build commit: 6eefde53ba5a5fd9bfcac37431aafdd496f5aa62 (6eefde53ba5a5fd9bfcac37431aafdd496f5aa62)

[rust-timer]

Queued 6eefde53ba5a5fd9bfcac37431aafdd496f5aa62 with parent f8d4ee7, future comparison URL.

[rust-timer]

Finished benchmarking commit (6eefde53ba5a5fd9bfcac37431aafdd496f5aa62): comparison url.

Summary: This benchmark run did not return any relevant changes.

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

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR led to changes in compiler perf.

@bors rollup=never
@rustbot label: +S-waiting-on-review -S-waiting-on-perf -perf-regression

[matthewjasper]

@bors r+

[bors]

📌 Commit 441c1a6 has been approved by matthewjasper

[bors]

⌛ Testing commit 441c1a6 with merge ec4bcaa...

[bors]

☀️ Test successful - checks-actions
Approved by: matthewjasper
Pushing ec4bcaa to master...

[rust-timer]

Finished benchmarking commit (ec4bcaa): comparison url.

Summary: This benchmark run did not return any relevant changes.

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

@rustbot label: -perf-regression