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/task/src/debug_format.rs

@@ -1,5 +1,5 @@
 use dap_types::StartDebuggingRequestArguments;
-use schemars::{gen::SchemaSettings, JsonSchema};
+use schemars::{r#gen::SchemaSettings, JsonSchema};
 use serde::{Deserialize, Serialize};
 use std::net::Ipv4Addr;
 use std::path::PathBuf;