Improve PowerShell Gallery release step by doing a verification of all published packages

[stijnmoreels]

Is your feature request related to a problem? Please describe.
It is a good think that right now, the deployment of packages is not stopped when a single package failed to upload to the PowerShell Gallery. The problem, though, is that the build does not fail at this point.

Describe the solution you'd like
Make sure that there's a final check that verifies if all the returned HTTP status codes from the packages are Created and not BadRequest. Also, make sure that the Conflict is seen as a success, as it means that the package is already there.

⚠️ Make sure that this is done at the very end so as not to block the release of other packages.

It is good to know that the automatically created GitHub release is a draft release (not published) so it can easily be removed if the release pipeline is run twice.