PySide6 debian pip packaging support

Under QTBUG-86955 we are trying to enable for Users "Qt6 for Python development".

It is supposed User has Raspberry Pi4 device and wants to build and run "Qt for Python" applications using Qt6 version.

According common information https://doc.qt.io/qtforpython/quickstart.html

User needs:

• Qt6 installation
• Python / pip /venv installation
• pyside6 package

• User will be able to apt-get Qt6 packages (covered: https://bugreports.qt.io/browse/QTBUG-100385)

• But there is no pyside6 packet available from ARM based Debian system:

  pip install pyside==6.0
  ERROR: Could not find a version that satisfies the requirement pyside==6.0 (from versions: 1.1.1, 1.1.2, 1.2.0, 1.2.1, 1.2.2, 1.2.4)
  ERROR: No matching distribution found for pyside==6.0
  

  pyside6 is not available for ARM64 architecture.

There is an official page:

https://pypi.org/project/PySide6/

It is inconvenient how user should install it for running Qt for Python apps on device.

crmaurei , sapiippo does it make sense to create a task and maintain pyside6 for ARM64 architecture?