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/agent_ui.rs

@@ -240,12 +240,7 @@ pub fn init(
         client.telemetry().clone(),
         cx,
     );
-    terminal_inline_assistant::init(
-        fs.clone(),
-        prompt_builder.clone(),
-        client.telemetry().clone(),
-        cx,
-    );
+    terminal_inline_assistant::init(fs.clone(), prompt_builder, client.telemetry().clone(), cx);
     cx.observe_new(move |workspace, window, cx| {
         ConfigureContextServerModal::register(workspace, language_registry.clone(), window, cx)
     })
@@ -391,7 +386,6 @@ fn register_slash_commands(cx: &mut App) {
     slash_command_registry.register_command(assistant_slash_commands::FetchSlashCommand, true);
 
     cx.observe_flag::<assistant_slash_commands::StreamingExampleSlashCommandFeatureFlag, _>({
-        let slash_command_registry = slash_command_registry.clone();
         move |is_enabled, _cx| {
             if is_enabled {
                 slash_command_registry.register_command(