[Issue 24705] Arguments of synchronized method are unintentionally treated as shared with -preview=nosharedaccess

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24705

--- Comment #1 from Kazuki Komatsu <komatsu.kazuki.op at tut.jp> ---
The latest (nightly) compiler version I tried is shown below, and this version
also outputs the same error.

```sh
$ dmd --version
DMD64 D Compiler v2.110.0-beta.1

Copyright (C) 1999-2024 by The D Language Foundation, All Rights Reserved
written by Walter Bright
```

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