UefiHidDxeV2: Remove mutable static shared reference

Use `addr_of!()` (raw pointer) to prevent a reference being created
to the mutable static variable.

```
  = note: this will be a hard error in the 2024 edition
  = note: this shared reference has lifetime `'static`, but if the
          static ever gets mutated, or a mutable reference is
		  created, then any further use of this shared reference is
		  Undefined Behavior
```

Signed-off-by: Michael Kubacki <[email protected]>

HidPkg/UefiHidDxeV2/src/keyboard.rs

@@ -1012,7 +1012,7 @@ mod test {
             keyboard_layout_ptr: *mut protocols::hii_database::KeyboardLayout,
         ) -> efi::Status {
             let mut keyboard_layout_buffer = vec![0u8; 4096];
-            let buffer_size = keyboard_layout_buffer.pwrite(unsafe { &TEST_KEYBOARD_LAYOUT }, 0).unwrap();
+            let buffer_size = keyboard_layout_buffer.pwrite(unsafe { ptr::addr_of!(TEST_KEYBOARD_LAYOUT) }, 0).unwrap();
             keyboard_layout_buffer.resize(buffer_size, 0);
             unsafe {
                 if keyboard_layout_length.read() < buffer_size as u16 {