cargo: Bump rustc to 1.89 (#36818)

Update Rustc to 1.89.

Reviewable by commit.

Leftover work:
- #37330 
- #38777

---------

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
Co-authored-by: sagudev <16504129+sagudev@users.noreply.github.com>

components/fonts/font_context.rs

@@ -320,7 +320,7 @@ impl FontContext {
                 font_key
             });
 
-        let key = *self
+        *self
             .webrender_font_instance_keys
             .write()
             .entry((font_key, pt_size, variations.clone()))
@@ -334,8 +334,7 @@ impl FontContext {
                     variations,
                 );
                 font_instance_key
-            });
-        key
+            })
     }
 
     fn invalidate_font_groups_after_web_font_load(&self) {

components/fonts/glyph.rs

@@ -606,7 +606,7 @@ impl GlyphStore {
     pub fn iter_glyphs_for_byte_range(
         &self,
         range: &Range<ByteIndex>,
-    ) -> impl Iterator<Item = GlyphInfo> + use<'_> {
+    ) -> impl Iterator<Item = GlyphInfo<'_>> + use<'_> {
         if range.begin() >= self.len() {
             panic!("iter_glyphs_for_range: range.begin beyond length!");
         }