bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

Related to https://issues.guix.gnu.org/67289#7

Here is the qutebrowser 3 process shell output. Would anyone recommend a 
solution?
```
$ qutebrowser
20:40:33 WARNING: Could not find the Qt platform plugin "wayland" in ""
20:40:33 CRITICAL: This application failed to start because no Qt platform 
plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: offscreen, vnc, minimal, xcb, vkkhrdisplay, 
linuxfb, minimalegl, eglfs.

Fatal Python error: Aborted

Current thread 0x00007f36c07e6740 (most recent call first):
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py",
 line 545 in __init__
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py",
 line 80 in run
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/qutebrowser.py",
 line 231 in main
  File 
"/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/bin/.qutebrowser-real",
 line 33 in <module>

Extension modules: PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets, 
markupsafe._speedups, yaml._yaml, PyQt6.QtNetwork, PyQt6.QtQml, PyQt6.QtOpenGL, 
PyQt6.QtDBus, PyQt6.QtPrintSupport, PyQt6.QtWebChannel, PyQt6.QtWebEngineCore, 
PyQt6.QtWebEngineWidgets, PyQt6.QtSql (total: 14)
```