Rollup of 7 pull requests Successful merges: - #95102 (Add known-bug for #95034) - #95579 (Add `<[[T; N]]>::flatten{_mut}`) - #95634 (Mailmap update) - #95705 (Promote x86_64-unknown-none target to Tier 2 and distribute build artifacts) - #95761 (Kickstart the inner usage of `macro_metavar_expr`) - #95782 (Windows: Increase a pipe's buffer capacity to 64kb) - #95791 (hide an #[allow] directive from the Arc::new_cyclic doc example) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup