#1480 Use conditional packages for v7 release

Author: thompson-tomo

projects/RabbitMQ.Client.OAuth2/RabbitMQ.Client.OAuth2.csproj

@@ -55,6 +55,9 @@
     <PackageReference Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="3.3.4" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="all" />
     <PackageReference Include="MinVer" Version="4.3.0" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
     <PackageReference Include="System.Net.Http.Json" Version="8.0.0" />
     <PackageReference Include="System.Text.Json" Version="8.0.1" />
   </ItemGroup>

projects/RabbitMQ.Client/RabbitMQ.Client.csproj

@@ -72,12 +72,12 @@
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="all" />
     <PackageReference Include="MinVer" Version="4.3.0" PrivateAssets="all" />
-    <PackageReference Include="System.Memory" Version="4.5.5" />
-    <PackageReference Include="System.Threading.Channels" Version="8.0.0" />
     <PackageReference Include="System.IO.Pipelines" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="7.0.2" />
+    <PackageReference Include="System.Memory" Version="4.5.5" />
+    <PackageReference Include="System.Threading.Channels" Version="8.0.0" />
   </ItemGroup>
 </Project>