terminal: Drain task output on completion (#23085)

Now we ensure that task output is fully drained and printed to Zed
terminal pane on task completion.

This change depends on a recent change to alacritty_terminal crate:
5e78d20c70.

Closes https://github.com/zed-industries/zed/issues/18342

Release Notes:

- Fixed missing task terminal output on Linux for short-running commands

crates/repl/src/outputs/plain.rs

@@ -187,10 +187,10 @@ impl TerminalOutput {
         for byte in text.as_bytes() {
             if *byte == b'\n' {
                 // Dirty (?) hack to move the cursor down
-                self.parser.advance(&mut self.handler, b'\r');
-                self.parser.advance(&mut self.handler, b'\n');
+                self.parser.advance(&mut self.handler, &[b'\r']);
+                self.parser.advance(&mut self.handler, &[b'\n']);
             } else {
-                self.parser.advance(&mut self.handler, *byte);
+                self.parser.advance(&mut self.handler, &[*byte]);
             }
         }