Fix jank in LSP debug log autoscroll (#22998)

Not sure why scroll was janky with `Autoscroll::newest()`, but this
appears to fix it. Probably better to conditionally do the autoscroll
requests anyway.

Release Notes:

- N/A

crates/editor/src/scroll/autoscroll.rs

@@ -32,10 +32,16 @@ impl Autoscroll {
     pub fn focused() -> Self {
         Self::Strategy(AutoscrollStrategy::Focused)
     }
+
     /// Scrolls so that the newest cursor is roughly an n-th line from the top.
     pub fn top_relative(n: usize) -> Self {
         Self::Strategy(AutoscrollStrategy::TopRelative(n))
     }
+
+    /// Scrolls so that the newest cursor is at the bottom.
+    pub fn bottom() -> Self {
+        Self::Strategy(AutoscrollStrategy::Bottom)
+    }
 }
 
 #[derive(PartialEq, Eq, Default, Clone, Copy)]