Release process with artifact testing

[mriccobene]

This PR implements some of what was established in Issue 5, in particular it integrates the Sync-From-Scratch test into the release workflow.

The test will run Erigon with an empty db and verify that it reaches the chain tip within a certain time and maintains it consistently. To minimize execution times it will run Erigon in minimal node configuration where we expect a total execution time of 3/4 hours.

So we will publish the release only if the test passes on all platforms.