Qt 6.2 hosts - macOS on ARM64 (moA)

Apple is moving macOS towards ARM64 based hardware. This Epic should cover all cross-Qt tasks to make it happen for macOS as a development host. This means but it not limited to

• Qt designer tooling (QDS) on macOS+ARM64
• Qt developer tooling on macOS+ARM64
• Qt Creator
  • Deploy, Debug, Profiling
  • Other developer tools part of Qt 6 and currently available on macOS+Intel based HW
• Setting up CI (COIN)
• Setting up RTA and other parts of test automation
• Cross compilation targets from macOS+ARM to same level as with macOS+Intel
• Enable PYSIDE on moA PYSIDE-802
• Enable QtWebEngine on ARM QTBUG-85537
• Documentation
• Qt Online Installer and Maintenance tool requirements
• What, if anything from here, we bring to Qt 5.15 LTS
• Other bits

Note that we still intent to support also macOS on Intel based hardware, that will be faded out later depending on market adoption of macOS+ARM64 as well as Apple compliance between Intel and ARM based HW as a development host.