Orleans 9 Support

[seniorquico]

This is a placeholder issue for supporting the newly released Orleans 9.

[seniorquico]

@ReubenBond Might the Orleans v8 packages receive ongoing updates (bug fixes?) similar to the v7 and v3 packages? Underlying question- should this project maintain a separate v8 branch to provide backwards compatibility for those that do not yet upgrade to v9? We have kept branches specific to v3 and v4 in this project for this reason. Thanks for any insights you can provide!

[ReubenBond]

Good question. We will likely issue 8.x updates if it is necessary, but the move from 7 to 8 and 8 to 9 are very minor. .NET 7 is out of service, so I don't anticipate any updates there. Orleans 9 targets the .NET 8 TFM, so upgrading from 8 to 9 is hopefully easier.