Use read-only access methods for read-only entity operations (#31254)

This PR replaces some `update()` calls with either `read()` or
`read_with()` when the `update()` call performed read-only operations on
the entity.

Many more likely exist, will follow-up with more PRs.

Release Notes:

- N/A

crates/auto_update/src/auto_update.rs

@@ -493,7 +493,7 @@ impl AutoUpdater {
 
     async fn update(this: Entity<Self>, mut cx: AsyncApp) -> Result<()> {
         let (client, installed_version, previous_status, release_channel) =
-            this.update(&mut cx, |this, cx| {
+            this.read_with(&mut cx, |this, cx| {
                 (
                     this.http_client.clone(),
                     this.current_version,