terminal: Consume event during processing (#30869)

By consuming the event during processing we save a few clones during
event processing.

Overall in this PR we save one Clone each during:

- Paste to the terminal
- Writing to the terminal
- Setting the title
- On every terminal transaction
- On every ViMotion when not using shift

Release Notes:

- N/A

crates/agent/src/terminal_codegen.rs

@@ -193,7 +193,8 @@ impl TerminalTransaction {
         });
     }
 
-    fn sanitize_input(input: String) -> String {
-        input.replace(['\r', '\n'], "")
+    fn sanitize_input(mut input: String) -> String {
+        input.retain(|c| c != '\r' && c != '\n');
+        input
     }
 }