Merged PR 54678: Disable Nuget Audit

Disable NuGet audit

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#### AI description  (iteration 1)
#### PR Classification
Configuration change to disable the NuGet audit feature.

#### PR Summary
This pull request updates the build configuration to temporarily disable NuGet audit due to current audit alerts.
- In `Directory.Build.props`, a new property group has been added that sets `<NuGetAudit>false</NuGetAudit>`, along with a TODO comment linking to #51466.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: dkurepa

Directory.Build.props

@@ -51,6 +51,11 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
+  <!-- TODO: Re-enable NuGet Audit and fix alerts: https://github.com/dotnet/sdk/issues/51466 -->
+  <PropertyGroup>
+    <NuGetAudit>false</NuGetAudit>
+  </PropertyGroup>
+
   <!-- Global usings -->
   <!-- See: https://learn.microsoft.com/dotnet/core/project-sdk/msbuild-props#using -->
   <ItemGroup>