Configure wgpu to be low-latency by default (#8203)

* initially done in https://github.com/emilk/egui/pull/8103, reverted in
#8167 due to resize hangs
* Related: https://github.com/emilk/egui/issues/8043 (maybe closes??)

Turns out the resize hangs were caused by the present_with_transaction
call. Disabling that when `desired_maximum_frame_latency == 1` causes
the window to resize smoothly.

Thanks @krisdigital for noticing that connection:
https://github.com/emilk/egui/issues/8043#issuecomment-4154440382

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

crates/egui-wgpu/src/lib.rs

@@ -87,13 +87,10 @@ impl SurfaceConfig {
     pub const LOW_LATENCY: Self = Self {
         present_mode: wgpu::PresentMode::AutoVsync,
 
-        #[expect(clippy::branches_sharing_code)]
         desired_maximum_frame_latency: if cfg!(target_os = "ios") {
             None // The default is good on iOS, while `Some(1)` cuts FPS in half
         } else {
-            // TODO(emilk): We would like yo use `Some(1)` here, but
-            // that causes bugs when resizing the window on macOS.
-            None
+            Some(1)
         },
     };