Update Aspire to stable Microsoft.Extensions.AI.Abstractions (#9356)

Author: stephentoub

Directory.Packages.props

@@ -156,8 +156,8 @@
   <ItemGroup>
     <!-- dotnet/extensions dependencies ** Common between net8 and net9 ** -->
     <PackageVersion Include="Microsoft.Extensions.AI" Version="$(MicrosoftExtensionsAIVersion)" />
-    <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="$(MicrosoftExtensionsAIVersion)" />
-    <PackageVersion Include="Microsoft.Extensions.AI.AzureAIInference" Version="$(MicrosoftExtensionsAIVersion)" />
+    <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="$(MicrosoftExtensionsAIPreviewVersion)" />
+    <PackageVersion Include="Microsoft.Extensions.AI.AzureAIInference" Version="$(MicrosoftExtensionsAIPreviewVersion)" />
     <PackageVersion Include="Microsoft.Extensions.Diagnostics.Testing" Version="$(MicrosoftExtensionsDiagnosticsTestingVersion)" />
     <PackageVersion Include="Microsoft.Extensions.Http.Resilience" Version="$(MicrosoftExtensionsHttpResilienceVersion)" />
     <PackageVersion Include="Microsoft.Extensions.TimeProvider.Testing" Version="$(MicrosoftExtensionsTimeProviderTestingVersion)" />

eng/Versions.props

@@ -38,7 +38,8 @@
     <MicrosoftDotNetBuildTasksInstallersVersion>9.0.0-beta.25225.6</MicrosoftDotNetBuildTasksInstallersVersion>
     <MicrosoftDotNetBuildTasksWorkloadsVersion>9.0.0-beta.25225.6</MicrosoftDotNetBuildTasksWorkloadsVersion>
     <!-- dotnet/extensions -->
-    <MicrosoftExtensionsAIVersion>9.4.4-preview.1.25259.16</MicrosoftExtensionsAIVersion>
+    <MicrosoftExtensionsAIVersion>9.5.0</MicrosoftExtensionsAIVersion>
+    <MicrosoftExtensionsAIPreviewVersion>9.5.0-preview.1.25265.7</MicrosoftExtensionsAIPreviewVersion>
     <!-- when updating this, also update cgmanifest.json as it is consumed in templates -->
     <MicrosoftExtensionsHttpResilienceVersion>9.4.0</MicrosoftExtensionsHttpResilienceVersion>
     <MicrosoftExtensionsDiagnosticsTestingVersion>9.4.0</MicrosoftExtensionsDiagnosticsTestingVersion>