Add version property for Microsoft.VisualStudio.SolutionPersistence (#47474)

Author: akoeplinger

Directory.Packages.props

@@ -70,7 +70,7 @@
     <PackageVersion Include="Microsoft.VisualStudio.Sdk" Version="17.2.32505.173" />
     <PackageVersion Include="Microsoft.VSSDK.BuildTools" Version="17.11.435" />
     <PackageVersion Include="Microsoft.VisualStudio.Setup.Configuration.Interop" Version="$(MicrosoftVisualStudioSetupConfigurationInteropVersion)" />
-    <PackageVersion Include="Microsoft.VisualStudio.SolutionPersistence" Version="1.0.52" />
+    <PackageVersion Include="Microsoft.VisualStudio.SolutionPersistence" Version="$(MicrosoftVisualStudioSolutionPersistenceVersion)" />
     <PackageVersion Include="Microsoft.Web.Deployment" Version="$(WebDeploymentPackageVersion)" />
     <PackageVersion Include="Microsoft.Web.Xdt" Version="$(MicrosoftWebXdtPackageVersion)" />
     <PackageVersion Include="Microsoft.Win32.SystemEvents" Version="$(MicrosoftWin32SystemEventsPackageVersion)" />

eng/Versions.props

@@ -64,6 +64,7 @@
     <MicrosoftVisualBasicVersion>10.3.0</MicrosoftVisualBasicVersion>
     <MicrosoftVisualStudioSetupConfigurationInteropVersion>3.2.2146</MicrosoftVisualStudioSetupConfigurationInteropVersion>
     <MicrosoftWindowsCsWin32PackageVersion>0.3.49-beta</MicrosoftWindowsCsWin32PackageVersion>
+    <MicrosoftVisualStudioSolutionPersistenceVersion>1.0.52</MicrosoftVisualStudioSolutionPersistenceVersion>
   </PropertyGroup>
   <PropertyGroup Label="NUnit3.DotNetNew.Template version">
     <!-- NUnit3.DotNetNew.Template versions do not 'flow in' -->