Use toggle function to pause/unpause (#22337)

# Objective

Avoid code duplication

## Solution

Use the newly added toggle function

## Testing

Ran the example

Author: GitGhillie

examples/gizmos/2d_gizmos.rs

@@ -210,10 +210,6 @@ fn update_config(
         };
     }
     if keyboard.just_pressed(KeyCode::Space) {
-        if virtual_time.is_paused() {
-            virtual_time.unpause();
-        } else {
-            virtual_time.pause();
-        }
+        virtual_time.toggle();
     }
 }

examples/gizmos/3d_gizmos.rs

@@ -292,10 +292,6 @@ fn update_config(
         config_store.config_mut::<AabbGizmoConfigGroup>().1.draw_all ^= true;
     }
     if keyboard.just_pressed(KeyCode::Space) {
-        if virtual_time.is_paused() {
-            virtual_time.unpause();
-        } else {
-            virtual_time.pause();
-        }
+        virtual_time.toggle();
     }
 }