chore: Fix refining_impl_trait lint occurences (#11979)

These show up when compiling Zed with latest nightly, which means that
we'd have to do it one or two Rust releases down the line.
Release Notes:

- N/A

crates/assistant/src/assistant_panel.rs

@@ -2756,7 +2756,7 @@ impl ConversationEditor {
 impl EventEmitter<ConversationEditorEvent> for ConversationEditor {}
 
 impl Render for ConversationEditor {
-    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl Element {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
         div()
             .key_context("ConversationEditor")
             .capture_action(cx.listener(ConversationEditor::cancel_last_assist))
@@ -2840,7 +2840,7 @@ struct InlineAssistant {
 impl EventEmitter<InlineAssistantEvent> for InlineAssistant {}
 
 impl Render for InlineAssistant {
-    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl Element {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
         let measurements = *self.measurements.lock();
         h_flex()
             .w_full()

crates/collab_ui/src/collab_panel.rs

@@ -2961,7 +2961,7 @@ struct DraggedChannelView {
 }
 
 impl Render for DraggedChannelView {
-    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl Element {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
         let ui_font = ThemeSettings::get_global(cx).ui_font.family.clone();
         h_flex()
             .font_family(ui_font)

crates/diagnostics/src/diagnostics.rs

@@ -87,7 +87,7 @@ struct DiagnosticGroupState {
 impl EventEmitter<EditorEvent> for ProjectDiagnosticsEditor {}
 
 impl Render for ProjectDiagnosticsEditor {
-    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl Element {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
         let child = if self.path_states.is_empty() {
             div()
                 .bg(cx.theme().colors().editor_background)

crates/gpui/src/interactive.rs

@@ -440,8 +440,8 @@ impl PlatformInput {
 mod test {
 
     use crate::{
-        self as gpui, div, Element, FocusHandle, InteractiveElement, IntoElement, KeyBinding,
+        self as gpui, div, FocusHandle, InteractiveElement, IntoElement, KeyBinding, Keystroke,
-        Keystroke, ParentElement, Render, TestAppContext, VisualContext,
+        ParentElement, Render, TestAppContext, VisualContext,
     };
 
     struct TestView {
@@ -453,7 +453,7 @@ mod test {
     actions!(test, [TestAction]);
 
     impl Render for TestView {
-        fn render(&mut self, cx: &mut gpui::ViewContext<Self>) -> impl Element {
+        fn render(&mut self, cx: &mut gpui::ViewContext<Self>) -> impl IntoElement {
             div().id("testview").child(
                 div()
                     .key_context("parent")

crates/project_panel/src/project_panel.rs

@@ -1899,7 +1899,7 @@ impl Render for ProjectPanel {
 }
 
 impl Render for DraggedProjectEntryView {
-    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl Element {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
         let settings = ProjectPanelSettings::get_global(cx);
         let ui_font = ThemeSettings::get_global(cx).ui_font.family.clone();
         h_flex()