Fix v23.06 ci

[olivier-roussel]

• Update ci.yml to run CI on the v23.06 branch (and not master)
• Temporarily disable MacOS build as it seems down

[olivier-roussel]

CI ended up in download timeouts, no idea why.

[alxbilger]

My guess is that downloading an item on https://download.qt.io/official_releases/online_installers/ does not respond

[olivier-roussel]

Windows build failed on downloading
https://download.qt.io/online/qtsdkrepository/windows_x86/desktop/qt5_5128/qt.qt5.5128.win64_msvc2017_64/5.12.8-0-202004051457qtbase-Windows-Windows_10-MSVC2017-Windows-Windows_10-X86_64.7z
which looks up to me.

[alxbilger]

It's a shame that Qt is required whereas this plugin does not need it

[olivier-roussel]

As for other plugins relying on SofaPython3, looks like CI needs the SofaPython v23.06 release. I will fix this when once available.

[olivier-roussel]

Looks like even sofa-framework/SofaPython3#364 won't fix the CI here.
Here the CI is trying to get (limited to the Ubuntu case):
Getting SofaPython3 from https://github.com/sofa-framework/SofaPython3/releases/download/release-master-nightly/SofaPython3_master-nightly_python-3.8_for-SOFA-v23.06_Linux.zip
which is not available.
sofa-framework/SofaPython3#364 will make available again only the master release, i.e. :
https://github.com/sofa-framework/SofaPython3/releases/download/release-master-nightly/SofaPython3_master-nightly_python-3.8_for-SOFA-master_Linux.zip.
But this v23.06 release of the plugin should rely on v23.06 release of SofaPython3 instead. I guess I will probably have to dig into the GitHub actions to make this possible.