Upgrade Python, Pandas, and SIP versions

[Ale Martinez]

Hi, this is a long standing request from people building from source willing to use current Python versions, thanks to Magnus Gille work it is now possible and configuration is easier than before, for Linux users building using system Python (3.10 or higher) should be trivial, see gcconfig.pri.in for details. SIP was upgraded to 6.5.1 and the requirement to use an old version of Pandas was removed.

The commit is large and involved but mostly due to the intricacies of distributing embedded Python with required modules in binary distributions for 3 OS, not source code changes per se.

https://github.com/GoldenCheetah/GoldenCheetah/commit/2eaf1bccc1611a219a9a8822c6ba5b89f5e8681a

Enjoy, Ale.

[Poncho]

Finally removing old sip and patched pandas from my system 🥳

Awesome work. Thanks to Magnus and Ale

[Paul J]

Great work, all installed without any issues    :)

Thank you Magnus and Ale.