Fix clippy::for_kv_map lint violations (#36493)

Release Notes:

- N/A

crates/project/src/lsp_store.rs

@@ -10883,7 +10883,7 @@ impl LspStore {
             // Find all worktrees that have this server in their language server tree
             for (worktree_id, servers) in &local.lsp_tree.instances {
                 if *worktree_id != key.worktree_id {
-                    for (_, server_map) in &servers.roots {
+                    for server_map in servers.roots.values() {
                         if server_map.contains_key(&key.name) {
                             worktrees_using_server.push(*worktree_id);
                         }

crates/project/src/manifest_tree.rs

@@ -77,7 +77,7 @@ impl ManifestTree {
             _subscriptions: [
                 cx.subscribe(&worktree_store, Self::on_worktree_store_event),
                 cx.observe_global::<SettingsStore>(|this, cx| {
-                    for (_, roots) in &mut this.root_points {
+                    for roots in this.root_points.values_mut() {
                         roots.update(cx, |worktree_roots, _| {
                             worktree_roots.roots = RootPathTrie::new();
                         })

crates/project/src/manifest_tree/server_tree.rs

@@ -312,8 +312,8 @@ impl LanguageServerTree {
 
     /// Remove nodes with a given ID from the tree.
     pub(crate) fn remove_nodes(&mut self, ids: &BTreeSet<LanguageServerId>) {
-        for (_, servers) in &mut self.instances {
-            for (_, nodes) in &mut servers.roots {
+        for servers in self.instances.values_mut() {
+            for nodes in &mut servers.roots.values_mut() {
                 nodes.retain(|_, (node, _)| node.id.get().is_none_or(|id| !ids.contains(id)));
             }
         }