Revert "chore: Bump Rust to 1.89 (#35788)" (#35843)

This reverts commit efba2cbfd3.

Unfortunately, the Docker image for 1.89 has not shown up yet. Once it
has, we should re-land this.

Release Notes:

- N/A

crates/gpui/src/platform/windows/wrapper.rs

@@ -1,6 +1,28 @@
 use std::ops::Deref;
 
-use windows::Win32::UI::WindowsAndMessaging::HCURSOR;
+use windows::Win32::{Foundation::HANDLE, UI::WindowsAndMessaging::HCURSOR};
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) struct SafeHandle {
+    raw: HANDLE,
+}
+
+unsafe impl Send for SafeHandle {}
+unsafe impl Sync for SafeHandle {}
+
+impl From<HANDLE> for SafeHandle {
+    fn from(value: HANDLE) -> Self {
+        SafeHandle { raw: value }
+    }
+}
+
+impl Deref for SafeHandle {
+    type Target = HANDLE;
+
+    fn deref(&self) -> &Self::Target {
+        &self.raw
+    }
+}
 
 #[derive(Debug, Clone, Copy)]
 pub(crate) struct SafeCursor {