[Epic]: Central Package Management improvements for 17.5

[jeffkl]

Issues

• NuGet transitive pinning changes g.props import order, breaking the build #12278
• PrivateAssets for central transitive dependencies should flow regardless whether the parent is a project or a package #12276

Pull Requests

• Fix build import order when using transitive pinning NuGet.Client#4958
• PrivateAssets for central transitive dependencies should flow regardless whether the parent node is a project or a package NuGet.Client#4952

[slang25]

Should this be added to the list?
NuGet/NuGet.Client#4832

[jeffkl]

@slang25 tooling support for central package management is tracked here: #9015

@martinrrm will dotnet add package support ship in .NET SDK 7.0.100 or 7.0.200?

[slang25]

#9015 (comment)