Merge #7702

7702: Remove use of deprecated `std::collections::Bound` r=Veykril a=bstrie

`std::collections::Bound` has been deprecated since Rust 1.26, but due to a bug (https://github.com/rust-lang/rust/issues/82080) it never triggered a visible deprecation warning. Fixing this is being done in https://github.com/rust-lang/rust/pull/82122 , but landing that requires rustc-analyzer to build without triggering any deprecation warnings (https://github.com/rust-lang-ci/rust/runs/1911884006#step:24:19361).

Co-authored-by: bstrie <865233+bstrie@users.noreply.github.com>