Reduce the release process time

The current release process is checking the auto-updater. The source code is frozen several times then:

• for the current version N, for the auto-updater test
• for the version N-1, for the auto-updater test
• for the current version N, again, for the final package

The last one is identical to the first one, there is no difference in the generated builds.

As the time taken for one package is quite big, we should get rid of the last freeze. Especially on macOS where the notarization is very long and prone to network errors.
We should find a way to keep the package from the first freeze for the final package.