Runtime: GA versioning for System.Numerics.Tensors

[Anipik]

Do we want to ship a stable version for System.Numerics.Tensors or dont ship any preview after rc2.

cc @ericstj @ViktorHofer @eerhardt @safern

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[eerhardt]

I don't believe we want to ship a stable version of this package at this time.

cc @jeffhandley @pgovind @eiriktsarpalis - the owners listed on https://github.com/dotnet/runtime/blob/master/docs/area-owners.md.

[ericstj]

We should just remove this from dotnet/runtime and put back to corefxlab. It was only moved to dotnet/runtime because it needed to ship a stable version and at the time corefxlab couldn't do that. Now that corefxlab has arcade infra I think this package should be moved back.

For 5.0 let's make sure not to ship any stable versions. For 6.0 + let's move it back to corefxlab.

[safern]

@jkotas was suggesting we move these to runtimelab. What would be the benefit of one over the other?

[jkotas]

The right place for experiments going forward is runtimelab.

Once we get runtimelab fully up and running, we should plan on archiving corefxlab. It is mentioned in https://github.com/dotnet/runtime/issues/35609 .

[Anipik]

The 5.0.0 related work has been done