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/net/hosts.rs

@@ -49,7 +49,7 @@ pub fn parse_hostsfile(hostsfile_content: &str) -> HashMap<String, IpAddr> {
         .collect()
 }
 
-pub fn replace_host(host: &str) -> Cow<str> {
+pub fn replace_host(host: &str) -> Cow<'_, str> {
     HOST_TABLE
         .lock()
         .unwrap()