Description

Change that all references of the msbuild package are marked as private assets, so they don't get added as dependency to the nuget package.

The dependecies field of the nuspec before the change:

<dependencies>
  <group targetFramework="net6.0">
    <dependency id="System.Text.Json" version="8.0.1" exclude="Build,Analyzers" />
  </group>
  <group targetFramework="net7.0">
    <dependency id="System.Text.Json" version="8.0.1" exclude="Build,Analyzers" />
  </group>
  <group targetFramework="net8.0">
    <dependency id="System.Text.Json" version="8.0.1" exclude="Build,Analyzers" />
  </group>
</dependencies>

and afer the change the dependencies of the nuspec look like this:

<dependencies>
  <group targetFramework="net6.0" />
  <group targetFramework="net7.0" />
  <group targetFramework="net8.0" />
</dependencies>

Related Issue

No, so far, happy to create one if the pr is not enough

Motivation and Context

The dependencies cause extra dll's to be published, for build only dependencies (PrivateAssets="All"). This problem seems to be cause by the change to the ceontral package management, where System.Text.Json was promoted to be included in the Directory.Build.props

How Has This Been Tested?

Build locally and checked the generated nuspec file in the outpur directory.

Screenshots (if appropriate):

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.