Make autoscroll optional when highlighting editor rows (#11950)

Previously, when highlighting editor rows with a color, we always
auto-scrolled to the first highlighted row. This was useful in contexts
like go-to-line and the outline view. We had an explicit special case
for git diff highlights. Now, part of the `highlight_rows` API, you
specify whether or not you want the autoscroll behavior. This is needed
because we want to highlight rows in the assistant panel, and we don't
want the autoscroll.

Release Notes:

- N/A

crates/editor/src/scroll/autoscroll.rs

@@ -1,13 +1,9 @@
-use std::{any::TypeId, cmp, f32};
-
-use collections::HashSet;
+use crate::{
+    display_map::ToDisplayPoint, DisplayRow, Editor, EditorMode, LineWithInvisibles, RowExt,
+};
 use gpui::{px, Bounds, Pixels, ViewContext};
 use language::Point;
-
-use crate::{
-    display_map::ToDisplayPoint, DiffRowHighlight, DisplayRow, Editor, EditorMode,
-    LineWithInvisibles, RowExt,
-};
+use std::{cmp, f32};
 
 #[derive(PartialEq, Eq, Clone, Copy)]
 pub enum Autoscroll {
@@ -107,14 +103,10 @@ impl Editor {
 
         let mut target_top;
         let mut target_bottom;
-        if let Some(first_highlighted_row) = &self
-            .highlighted_display_rows(
-                HashSet::from_iter(Some(TypeId::of::<DiffRowHighlight>())),
-                cx,
-            )
-            .first_entry()
+        if let Some(first_highlighted_row) =
+            self.highlighted_display_row_for_autoscroll(&display_map)
         {
-            target_top = first_highlighted_row.key().as_f32();
+            target_top = first_highlighted_row.as_f32();
             target_bottom = target_top + 1.;
         } else {
             let selections = self.selections.all::<Point>(cx);
@@ -244,7 +236,10 @@ impl Editor {
         let mut target_left;
         let mut target_right;
 
-        if self.highlighted_rows.is_empty() {
+        if self
+            .highlighted_display_row_for_autoscroll(&display_map)
+            .is_none()
+        {
             target_left = px(f32::INFINITY);
             target_right = px(0.);
             for selection in selections {