Exclude dev extensions from auto-updates (#14680)

This PR makes it so dev extensions that are installed are excluded when
checking for extension updates.

We don't want to accidentally clobber dev extensions if the upstream
extension is deemed more "up-to-date".

Release Notes:

- Changed dev extensions to be excluded from extension auto-updates.

crates/extension/src/extension_store.rs

@@ -456,9 +456,9 @@ impl ExtensionStore {
         let extension_ids = self
             .extension_index
             .extensions
-            .keys()
-            .map(|id| id.as_ref())
-            .filter(|id| extension_settings.should_auto_update(id))
+            .iter()
+            .filter(|(id, entry)| !entry.dev && extension_settings.should_auto_update(id))
+            .map(|(id, _)| id.as_ref())
             .collect::<Vec<_>>()
             .join(",");
         let task = self.fetch_extensions_from_api(