chore: Prepare for Rust edition bump to 2024 (without autofix) (#27791)

Successor to #27779 - in this PR I've applied changes manually, without
futzing with if let lifetimes at all.

Release Notes:

- N/A

crates/zlog/src/zlog.rs

@@ -371,7 +371,9 @@ pub mod scope_map {
             "warn" => log_impl::Level::Warn,
             "error" => log_impl::Level::Error,
             "off" | "disable" | "no" | "none" | "disabled" => {
-                crate::warn!("Invalid log level \"{level_str}\", set to error to disable non-error logging. Defaulting to error");
+                crate::warn!(
+                    "Invalid log level \"{level_str}\", set to error to disable non-error logging. Defaulting to error"
+                );
                 log_impl::Level::Error
             }
             _ => {