Update actions/download-artifact and actions/upload-artifact to v4

[mathbunnyru]

Describe your changes

Issue ticket if applicable

Checklist (especially for first-time contributors)

• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests
• I will try not to use force-push to make the review process easier for reviewers
• I have updated the documentation for significant changes

[mathbunnyru]

I had to update this manually, otherwise, dependabot would create separate PR for each action and one for all workflows. And downloading artifacts that were created from action/upload-artifact@v3 and below are not supported by action/download-artifact@v4.

[mathbunnyru]

x86_64 base upload went down from 1m23s to 10s
aarch64 base upload went down from 1m39s to 15s

Finally, we get good performance.
Should significantly decrease total CI time.
Obviously, the devs of these actions didn't like my PR: #2059 (this PR only made sense because of slow uploads).

[mathbunnyru]

1h 2m 24s - that's great, merging this one.