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/script/dom/promise.rs

@@ -258,7 +258,7 @@ impl Promise {
     }
 
     #[allow(unsafe_code)]
-    pub(crate) fn promise_obj(&self) -> HandleObject {
+    pub(crate) fn promise_obj(&self) -> HandleObject<'_> {
         let obj = self.reflector().get_jsobject();
         unsafe {
             assert!(IsPromiseObject(obj));