Enable DotNetFinalVersionKind to remove the patch version and prerelease qualifiers from package names

[carlossanlop]

I missed this property in my previous PR. Without it, the packages are still getting pushed to the dotnet-libraries feed with the prerelease qualifiers and the patch version in their names. Example: https://dnceng.visualstudio.com/public/_artifacts/feed/dotnet-libraries/NuGet/System.Numerics.Vectors/overview/4.6.0-rtm.24531.3

After merging this, each release will be pushed to its own isolated feed, and the package names will not contain any prerelease qualifiers and patch versions in their names.

We don't have to merge this right away. Let's wait until we finish fine tuning the last details in the repo.

[carlossanlop]

Changing it to draft so we don't merge it accidentally. I'd like to wait until everything else looks good.

[ericstj]

So what's the story for how this works - will we check it in and leave it on - or toggle it in source on/off/on/off? Did you consider passing it in when scheduling the build? Where did you want to document your process for releasing m-p?

[carlossanlop]

So what's the story for how this works - will we check it in and leave it on - or toggle it in source on/off/on/off?

Just like we do in release/8.0 in runtime: we need to turn off is the <IsPackable> property in all packages until we need to publish a new fix.

Did you consider passing it in when scheduling the build? Where did you want to document your process for releasing m-p?

I'd rather do what we do in runtime: keep the DotNetFinalVersionKind property enabled permanently.

This is already partially documented in the README.md, but I can expand it. I'll add the extra info in this PR.

[ericstj]

Ok, keeping this on all the time means it will be difficult to do any sort of preview. That might be OK considering that we only intend to bring stuff over that's already in servicing mode.

[carlossanlop]

Ok, keeping this on all the time means it will be difficult to do any sort of preview.

Would there be an issue if we just delete the property to revert back to preview mode? That should revert back to publishing to the dotnet-libraries feed and would add the prerelease suffixes to the nupkgs. Then when we're ready, we add the property back.