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/agent_ui/src/buffer_codegen.rs

@@ -1129,7 +1129,7 @@ mod tests {
             )
         });
 
-        let chunks_tx = simulate_response_stream(codegen.clone(), cx);
+        let chunks_tx = simulate_response_stream(&codegen, cx);
 
         let mut new_text = concat!(
             "       let mut x = 0;\n",
@@ -1196,7 +1196,7 @@ mod tests {
             )
         });
 
-        let chunks_tx = simulate_response_stream(codegen.clone(), cx);
+        let chunks_tx = simulate_response_stream(&codegen, cx);
 
         cx.background_executor.run_until_parked();
 
@@ -1265,7 +1265,7 @@ mod tests {
             )
         });
 
-        let chunks_tx = simulate_response_stream(codegen.clone(), cx);
+        let chunks_tx = simulate_response_stream(&codegen, cx);
 
         cx.background_executor.run_until_parked();
 
@@ -1334,7 +1334,7 @@ mod tests {
             )
         });
 
-        let chunks_tx = simulate_response_stream(codegen.clone(), cx);
+        let chunks_tx = simulate_response_stream(&codegen, cx);
         let new_text = concat!(
             "func main() {\n",
             "\tx := 0\n",
@@ -1391,7 +1391,7 @@ mod tests {
             )
         });
 
-        let chunks_tx = simulate_response_stream(codegen.clone(), cx);
+        let chunks_tx = simulate_response_stream(&codegen, cx);
         chunks_tx
             .unbounded_send("let mut x = 0;\nx += 1;".to_string())
             .unwrap();
@@ -1473,7 +1473,7 @@ mod tests {
     }
 
     fn simulate_response_stream(
-        codegen: Entity<CodegenAlternative>,
+        codegen: &Entity<CodegenAlternative>,
         cx: &mut TestAppContext,
     ) -> mpsc::UnboundedSender<String> {
         let (chunks_tx, chunks_rx) = mpsc::unbounded();