Set release to `-dev` after publishing

[mattjohnsonpint]

With sentry-cli, we don't want to accidentally associate release info for work-in-progress with the last shipped release. Currently, that would happen because we keep the <Version> in Directory.Build.props untouched until publishing each release.

Add a small post-release script to add a -dev tag.

[ericsampson]

The recent (.NET 8) default addition of the commit hash as part of AssemblyInformationalVersion might help address this, maybe the sentry SDK could recreate this format for older .NET SDKs/Framework

[bitsandfoxes]

@jamescrosswell with #3462 merged, we're going to run into this issue, right?

[jamescrosswell]

@jamescrosswell with #3462 merged, we're going to run into this issue, right?

Very likely yes. At least now with SetCommits we should get specific commits associated with each release as well but it would still be misleading to associate all our dev work on release N + 1 with release N... so I think Matt's suggestion of adding some suffix like -dev or -next.wip or something makes sense.