Upgrade actions/upload-artifact calls to latest v4 (OSOE-809)

[BenedekFarkas]

As it brings a lot of improvements, see the announcement.

See its usages across the Lombiq organization.

Any particular reason we don't have a wrapper action yet?

Jira issue

[Piedone]

Duplicate of: #272. I added a note there to also have a wrapper.

[BenedekFarkas]

OK then! AFAIK we don't have any usages of it where the time reduction would be of huge impact right now (= not having to wait that much + runner cost). The only exception is a client project that I just upgraded and uploading a 500-something MB artifact took 21 seconds instead of 2 and a half minutes, which is great.

[Piedone]

Yeah, that'll be nice but not crucial. Most of our projects only upload artifacts on some failure anyway.