Bump artifact-related actions to v4

[sergiou87]

• Upgrade upload-artifacts and download-artifacts to v4
• In order to do that, bump the GLIBC requirements by using Ubuntu 20.04 to build Dugite
• I noticed macos-11 runners are not available anymore, so I bumped those to macos-12 and we will use Xcode 13.1 from now on (it's the oldest one available, for maximum compatibility).

[sergiou87]

Hey @theofficialgman 👋

Version 3 of the actions upload-artifacts and download-artifacts is gonna be deprecated soon, so we want to move to v4. However, v4 requires Node 20 which in turn requires GLIBC 2.28.

Do you still need GLIBC 2.17 for the Linux builds or is it now a good time to bump them to 2.28? If 2.17 is still required, could you try to fix this issue? Otherwise, we lack the time and expertise to make it happen… 😕

Thanks in advance 🙏

[theofficialgman]

Do you still need GLIBC 2.17 for the Linux builds or is it now a good time to bump them to 2.28?

That's a question up to @shiftkey

[shiftkey]

I think I'm good to do this upgrade, and handle the comms when we publish the first version of the Linux builds that need a later glibc...

[theofficialgman]

Ok. @sergiou87 then just bump ubuntu:18.04 to ubuntu:20.04 in the ci.yml in all 3 places