Fix clippy::redundant_clone lint violations (#36558)

This removes around 900 unnecessary clones, ranging from cloning a few
ints all the way to large data structures and images.

A lot of these were fixed using `cargo clippy --fix --workspace
--all-targets`, however it often breaks other lints and needs to be run
again. This was then followed up with some manual fixing.

I understand this is a large diff, but all the changes are pretty
trivial. Rust is doing some heavy lifting here for us. Once I get it up
to speed with main, I'd appreciate this getting merged rather sooner
than later.

Release Notes:

- N/A

crates/agent2/src/db.rs

@@ -287,7 +287,7 @@ impl ThreadsDatabase {
         .map_err(|e| anyhow!("Failed to create threads table: {}", e))?;
 
         let db = Self {
-            executor: executor.clone(),
+            executor,
             connection: Arc::new(Mutex::new(connection)),
         };
 
@@ -325,7 +325,7 @@ impl ThreadsDatabase {
             INSERT OR REPLACE INTO threads (id, summary, updated_at, data_type, data) VALUES (?, ?, ?, ?, ?)
         "})?;
 
-        insert((id.0.clone(), title, updated_at, data_type, data))?;
+        insert((id.0, title, updated_at, data_type, data))?;
 
         Ok(())
     }
@@ -434,7 +434,7 @@ mod tests {
             let client = Client::new(clock, http_client, cx);
             agent::init(cx);
             agent_settings::init(cx);
-            language_model::init(client.clone(), cx);
+            language_model::init(client, cx);
         });
     }