bug#68513: Qutebrowser 3, PermissionError qtwebengine_devtools_resources.pak

[chris]

When starting Qutebrowser 3, the shell process shows these messages related to 
a permission error. The messages include a CJK error that is rendered by 
debbugs as "??" and the message basically translates as "no permission"

```sh
$ qutebrowser
08:17:14 ERROR: Failed to copy webengine resources, not applying quirk
Traceback (most recent call last):
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py",
 line 253, in patch_webengine
    webengine_resources_path = copy_webengine_resources()
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py",
 line 197, in copy_webengine_resources
    shutil.rmtree(work_dir)
  File 
"/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py",
 line 724, in rmtree
    _rmtree_safe_fd(fd, path, onerror)
  File 
"/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py",
 line 680, in _rmtree_safe_fd
    onerror(os.unlink, fullname, sys.exc_info())
  File 
"/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py",
 line 678, in _rmtree_safe_fd
    os.unlink(entry.name, dir_fd=topfd)
PermissionError: [Errno 13] 許可がありません: 'qtwebengine_devtools_resources.pak'
```

Thanks in advance for any advice or input

Related: https://issues.guix.gnu.org/67289, https://issues.guix.gnu.org/68483