Ensure that different platforms create exactly the same binary

[pavelzw]

It would be nice to have an integration test that checks whether the binaries between macOS, Linux and Windows produce the same SHA256.

One option could be to pre-calculate a SHA256 and save it in the test. This would require updating the test every time a new version releases (version is encoded in pack).
Another option would be to compute them during testing and then gather them in a second CI stage and compare them there.