[$] Best practices for error handling in kernel Rust

Dirk Behme led a session discussing the use of Rust's question-mark operator inthe kernel at Kangrejos 2024. He was particularly concerned with the concept of"silent" errors that don't print any messages to the console.Other attendees were less convinced that this was a problem, but his presentationsparked a lot of discussion about whether the Rust-for-Linux project couldimprove error handling in kernel Rust code.