Use attribute parser for checking #[may_dangle] attribute

[obeis]

Updates #153101

This PR is stacked on top of #162683 and #162530, review should be on the last commit only. Once those PRs are merged, I will rebase my branch.

r? @JonathanBrouwer

CC @mejrs

[rustbot]

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

Some changes occurred in compiler/rustc_attr_parsing

cc @jdonszelmann, @JonathanBrouwer

Some changes occurred in compiler/rustc_passes/src/check_attr.rs

cc @jdonszelmann, @JonathanBrouwer

Some changes occurred in compiler/rustc_attr_ir

cc @jdonszelmann, @JonathanBrouwer

[JonathanBrouwer]

I'll wait with reviewing this until the two PRs its based on have landed

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.