bevy_pbr: Use Vec::append instead of a for loop and Vec::drain

Author: superdump

crates/bevy_pbr/src/render/light.rs

@@ -142,9 +142,7 @@ impl GpuPointLights {
                 buffer.push(gpu_point_lights.try_into().unwrap());
             }
             GpuPointLights::Storage { buffer } => {
-                for light in lights.drain(..) {
-                    buffer.push(light);
-                }
+                buffer.append(&mut lights);
             }
         }
     }

crates/bevy_render/src/render_resource/storage_buffer.rs

@@ -161,4 +161,9 @@ impl<T: AsStd430, U: AsStd430> StorageBuffer<T, U> {
     pub fn push(&mut self, value: T) {
         self.values.push(value);
     }
+
+    #[inline]
+    pub fn append(&mut self, values: &mut Vec<T>) {
+        self.values.append(values);
+    }
 }