Upgrade Intel Mac Minis to latest OS + Parallels

Upgrade our Intel Mac Minis to macOS 13 + Parallels 18. qt-srv-mac23 is reserved for testing this change. Following tasks are needed:

1. Update host macOS version. Because of this we need to port our Parallels plugin from Python 2 to Python 3.
2. Update Parallels version. Includes a newer Parallels SDK so we need to port our Parallels plugin as well for this new SDK.
3. Re-compile VNC plugin because of Parallels SDK update
4. Create Intel macOS 13 Tier1 image + provisionings
5. Test all macOS versions on this new host setup so we do not break anything