Suppressed CS8002 for Anthropic package (#2461)

Author: dmytrostruk

dotnet/src/Microsoft.Agents.AI.Anthropic/Microsoft.Agents.AI.Anthropic.csproj

@@ -4,6 +4,7 @@
     <VersionSuffix>preview</VersionSuffix>
     <ImplicitUsings>enable</ImplicitUsings>
     <InjectSharedThrow>true</InjectSharedThrow>
+    <NoWarn>$(NoWarn);CS8002</NoWarn>
   </PropertyGroup>
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />